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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260624T100000
DTEND;TZID=Europe/Paris:20260624T110000
DTSTAMP:20260618T125124Z
CREATED:20260618T125124Z
LAST-MODIFIED:20260618T125124Z
UID:10000202-1782295200-1782298800@sfp-alpes.fr
SUMMARY:Mucio A. CONTINENTINO (Centro Brasileiro de Pesquisas Físicas\, Rio de Janeiro\, Brazil)
DESCRIPTION:Dehybridization transition in multi-band systems: a renormalization group approach \nRésumé : \nIn strongly correlated multi-band systems\, such as transition metal intermetallics\, heavy fermions\, and Kondo insulators\, electron-electron interactions lead to the damping of electronic quasiparticles at finite temperatures. This phenomenon results in an effective dehybridization between the electrons in the large conduction band and those in the narrow\, correlated band. The dehybridization effect has been employed to explain the transport properties of intermetallics and the results of angle-resolved photoemission spectroscopy (ARPES) experiments on heavy fermions at sufficiently high temperatures (1). Recent insights from the theory of non-Hermitian systems provide a novel perspective on this problem. In this work\, we adopt this viewpoint through a renormalization group (RG) approach. We derive RG equations for a one-dimensional two-band model to identify the exceptional points of this system and to characterize its topological properties in the presence of dissipation. Our findings reveal that for a non- trivial topological sp-chain\, dehybridization can be interpreted as a topological phase transition\, characterized by critical exponents that we calculate. By employing a parametrization of the self-energy in a strongly correlated system\, computed numerically\, we investigate the temperature dependence of the lifetime of heavy quasiparticles. From these results\, a characteristic temperature related to dehybridization emerges. We discuss whether this temperature represents a new energy scale or if it is associated with the Kondo or coherence temperatures in the phase diagram of heavy fermions [2].\n\nReferences\n1. C. Adriano\, F. Rodolakis\, P. F. S. Rosa\, F. Restrepo\, M. A. Continentino\, Z. Fisk\, J. C. Campuzano\, and P. G. Pagliuso\, Unveiling the hybridization gap in Ce2RhIn8 heavy fermion compound\, arXiv:1502.02544 [cond-mat.str-el]\, https://doi.org/10.48550/arXiv.1502.02544\n2. Dehybridization transition in Kondo insulators and heavy fermions\, arXiv:2505.04730. https://doi.org/10.48550/arXiv.2505.04730\n\n_\n\nContact : claudine.lacroix@neel.cnrs.fr \n\n\n\n\n 
URL:https://sfp-alpes.fr/event/mucio-a-continentino-centro-brasileiro-de-pesquisas-fisicas-rio-de-janeiro-brazil/
LOCATION:CNRS – Salle Rémy Lemaire (K223)\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260624T110000
DTEND;TZID=Europe/Paris:20260624T120000
DTSTAMP:20260619T133132Z
CREATED:20260618T094702Z
LAST-MODIFIED:20260619T133132Z
UID:10000200-1782298800-1782302400@sfp-alpes.fr
SUMMARY:Louisa CASTEL (LPMMC)
DESCRIPTION:Theoretical Study of Two Coupled 1D Exciton-Polariton Condensates\nRésumé : \nExciton-polaritons are elementary bosonic excitations formed in a semiconductor microcavity under incoherent optical pumping. Under certain conditions\, a gas of exciton polaritons can undergo a Bose-Einstein transition to form a non-equilibrium condensate\, whose statistical properties are very different from those of equilibrium condensates. In this work\, we explore analytically and numerically the physics of two tunnel-coupled one-dimensional exciton-polariton condensates. \n_ \nConctact : pierre.nataf@lpmmc.cnrs.fr
URL:https://sfp-alpes.fr/event/louisa-castel-lpmmc/
LOCATION:LPMMC – salle Roger Maynard (G421)\, CNRS - LPMMC 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260624T113000
DTEND;TZID=Europe/Paris:20260624T123000
DTSTAMP:20260618T095054Z
CREATED:20260618T095054Z
LAST-MODIFIED:20260618T095054Z
UID:10000201-1782300600-1782304200@sfp-alpes.fr
SUMMARY:Mathias GODEFROI (LPMMC)
DESCRIPTION:TITRE A VENIR\n_ \nContact : pierre.nataf@lpmmc.cnrs.fr
URL:https://sfp-alpes.fr/event/mathias-godefroi-lpmmc/
LOCATION:LPMMC – salle Roger Maynard (G421)\, CNRS - LPMMC 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260625T130000
DTEND;TZID=Europe/Paris:20260625T140000
DTSTAMP:20260612T075402Z
CREATED:20260507T093855Z
LAST-MODIFIED:20260612T075402Z
UID:10000148-1782392400-1782396000@sfp-alpes.fr
SUMMARY:Elodie LAINE (Sorbone Université)
DESCRIPTION:What evolution tells us about the impact of mutations — and how to scale it up\n_ \nContact : lucie.lamothe@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/elodie-laine-sorbone-universite/
LOCATION:IMAG – Salle de Réunion\, 150 place du Torrent\, St Martin d’Hères\, 38400\, France
CATEGORIES:Séminaire
ORGANIZER;CN="TIMC - IMAG":MAILTO:lucie.lamothe@univ-grenoble-alpes.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260625T140000
DTEND;TZID=Europe/Paris:20260625T150000
DTSTAMP:20260521T145948Z
CREATED:20260521T145948Z
LAST-MODIFIED:20260521T145948Z
UID:10000158-1782396000-1782399600@sfp-alpes.fr
SUMMARY:Ismaele Vincent MASIELLO (TU WIEN\, Austria)
DESCRIPTION:Nonclassicality\, quasiprobabilities and weak values explored in neutron interferometry\nRésumé : \nThe violation of Bell inequalities has demonstrated that quantum mechanics exhibits features with no classical counterpart; however\, identifying the boundary between quantumness and classicality remains a nontrivial task. Quasiprobability representations and weak values are valuable tools for investigating these boundaries\, and their physical relevance has been confirmed across a range of impactful experiments. Several of these experiments have been implemented in neutron interferometry\, a platform that has historically played a central role in the study of foundational quantum mechanics and nonclassicality. Compared to typical photonic implementations\, it is less susceptible to classical reinterpretations\, as it involves a single massive particle in a superposition of two or three spatially separated paths. Moreover\, it offers several experimental advantages\, such as macroscopic beam separation\, individual control of the sub-beams\, and long interaction and coherence times at room temperature and ambient pressure. In this talk\, I will introduce weak values and quasiprobabilities as tools to investigate the quantum–classical boundary and present results obtained in neutron interferometry.\n_ \nHanno Filter (College 3 Secretary) \nExternal visitors may ask for a site access to tellier(at)ill.fr \nZoom link : https://ill.zoom.us/j/98964195699?pwd=vPhNT17CAeoDUr7QX4PjfyPnWsHuMU.1 – Password : SeminarC3 \n  \n 
URL:https://sfp-alpes.fr/event/ismaele-vincent-masiello-tu-wien-austria/
LOCATION:ILL – Salle de Séminaire (110-111)\, ILL 50 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260625T140000
DTEND;TZID=Europe/Paris:20260625T150000
DTSTAMP:20260529T143015Z
CREATED:20260529T142941Z
LAST-MODIFIED:20260529T143015Z
UID:10000172-1782396000-1782399600@sfp-alpes.fr
SUMMARY:Benjamin BACQ-LABREUIL (IPCMS\, Université Strasbourg)
DESCRIPTION:The Role of the Apical Oxygen in Cuprate High-Temperature Superconductors\nRésumé : \nScanning tunneling microscopy measurements exploiting the natural superstructure modulation of the cuprate superconductor Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ (Bi-2212) have revealed a possible correlation between the Cu-apical-O distance and the superconducting order parameter\, as reported recently by O’Mahony et al. [1]. These observations were interpreted as evidence for a direct link between superconductivity and the charge-transfer gap\, and more broadly revived the long-standing question of the role of apical oxygens in cuprate superconductivity. In this talk\, I will discuss the impact of apical oxygen displacement on the superconducting properties of Bi$_2$Sr$_2$CuO$_{6+x}$\, Bi-2212\, and HgBa$_2$CuO$_{4+x}$ [2]\, leveraging a recently developed first-principles framework for high-temperature superconductors [3]. The quantitative agreement between our calculations and experiments allows us to unambiguously attribute the observed variations of superconducting order parameter to changes in the apical distance. We demonstrate\, however\, that the latter controls the former predominantly via the effective hole-doping of the CuO$_2$ planes\, with negligible effect on the charge-transfer gap. The modest magnitude of the order parameter modulation induced by apical-oxygen displacement alone therefore warrants caution in interpreting correlations between $T_c$ and the apical distance inferred from comparisons across different cuprate compounds. \n[1] O’Mahony\, et al.\, Proc. Natl. Acad. Sci. 119\, e2207449119 (2022) \n[2] S. Vadnais\, et al.\, arXiv:2601.16017 (2026) \n[3] B. Bacq-Labreuil\, et al.\, Phys. Rev. X 15\, 021071 (2025) \n_ \nContact : florence.levy-bertrand@neel.cnrs.fr 
URL:https://sfp-alpes.fr/event/benjamin-bacq_labreuil-ipcms-universite-strasbourg/
LOCATION:CNRS – Salle Rémy Lemaire (K223)\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260626T110000
DTEND;TZID=Europe/Paris:20260626T120000
DTSTAMP:20260604T145405Z
CREATED:20260604T145405Z
LAST-MODIFIED:20260604T145405Z
UID:10000191-1782471600-1782475200@sfp-alpes.fr
SUMMARY:Christophe MASSELON (CEA-Irig/BGE) et Vincent AGACHE (CEA-Leti/DTIS)
DESCRIPTION:Sensing Mass at the Nanoscale : Suspended Nanochannel Resonators and NEMS-MS for Biology\nRésumé : \n\nDetermining the mass of biological nanoparticles opens new avenues for characterizing biological systems at their own scale. In this joint seminar\, researchers from LETI and IRIG will present two complementary nanoresonator platforms : Suspended Nanochannel Resonators (SNR)\, which operate in solution\, and Nanoelectromechanical Mass Spectrometry (NEMS-MS)\, which operates in the gas phase. Together\, these technologies cover a range of biological particles\, from lipid nanoparticles and extracellular vesicles to viral particles. Beyond the technical principles underlying each platform\, selected applications will illustrate the potential of these approaches for the characterization of biological samples.​​​​​\n​\n\n\n\nLes séminaires et soutenances sont ouverts à tous\, notez toutefois que l’accès au campus EPN nécessite un avis de rendez-vous. Merci de remplir ce formulaire  et de l’adresser\, plus de 48h à l’avance\, à ce contact.\nPensez à vous munir d’une pièce d’identité le jour de votre visite.
URL:https://sfp-alpes.fr/event/christophe-masselon-cea-irig-bge-et-vincent-agache-cea-leti-dtis/
LOCATION:IBS – Salle des séminaires\, IBS 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IRIG - CEA":MAILTO:irig.communication@cea.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260626T110000
DTEND;TZID=Europe/Paris:20260626T120000
DTSTAMP:20260618T094136Z
CREATED:20260618T094136Z
LAST-MODIFIED:20260618T094136Z
UID:10000199-1782471600-1782475200@sfp-alpes.fr
SUMMARY:Rémi AVRILLER
DESCRIPTION:Resonance energy transfer in molecular aggregates : a stochastic approach\nLe séminaire théorie est financé par la fédération de recherche Quantalps. \nRésumé : \nWe investigate theoretically how energy dissipates and migrates from one place to another in complex and bi-dimensional molecular aggregates. In this context\, a key role is played by resonance electronic energy transfer (RET) processes [1] through which an excitation initially stored onto a donor molecule (D) can be transferred to an acceptor molecule (A). Despite its long history\, the mechanism of RET is still not completely understood and is the object of intense research activities and debates [2].\nIn this presentation\, we address the question of how to describe collective and non-equilibrium effects in RET processes after all the donor molecules have been excited by a pump laser (see Fig). We predict that\, due to the dimensionality of the network\, the effective rate of RET scales as ^{\alpha}\, with the average distance between individual excited donors and their nearest-neighbor acceptor molecules\, and \alpha \in [-6\, -2] an exponent depending on the spatial distribution of molecular pairs in the 2D sample [3]. We show departures from this mean-field description arising from fluctuations and spatial correlations between several molecules involved in the RET process.\nThe relevance of such stochastic approaches is further investigated in order to capture the essential features of more recent experiments related to energy transfer in optical cavities [4]. In the latter case\, we show as preliminary results that the interaction between pairs of molecules inside cavity can be highly modified with consequences on the kinetics of RET processes inside cavity [5]. \nReferences :\n[1] T. Förster. “Transfer mechanisms of electronic excitation energy” (1960). \n[2] S. Jang\, M. D. Newton\, and R. J. Silbey. Phys. Rev. Lett. 92\, 218301 (2004). \n[3] R. Avriller\, A. Marché\, and G. Jonusauskas\, Phys. Rev. B 108\, 205419 (2023). \n[4] X. Zhong et al.\, Angewandte Chemie International Edition\, 56(31)\, 9034-9038 (2017). \n[5] K. Wu\, D. Hagenmüller et R. Avriller\, in preparation (2026). \n_ \nContact : jeanne.colbois@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/remi-avriller/
LOCATION:LPMMC – salle Roger Maynard (G421)\, CNRS - LPMMC 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260629T140000
DTEND;TZID=Europe/Paris:20260629T150000
DTSTAMP:20260604T134030Z
CREATED:20260604T134030Z
LAST-MODIFIED:20260604T134030Z
UID:10000185-1782741600-1782745200@sfp-alpes.fr
SUMMARY:Dario DAGHERO (Department of Applied Science and Technology\, Politecnico di Torino)
DESCRIPTION:Point Contact Andreev-Reflection Spectroscopy : mechanisms\, models and examples\nRésumé : \nPoint-contact spectroscopy [1] in superconductors\, also known as point-contact Andreev-Reflection spectroscopy (PCARS) is a simple but powerful and versatile technique that allows a direct determination of the number\, the amplitude and the symmetry of the energy gap(s) in superconducting materials [2\,3]. The technique is rather simple in principle\, i.e. it just consists in creating a small (point-like) contact between a normal metal and a superconductor\, and to measure its differential conductance as a function of the bias voltage across the junction. However\, there are several complications that make this simple recipe fairly difficult to realize in practice. First of all\, the contact must be in the spectroscopic regime [1\,2\,3]\, i.e. electrons from the normal metal must be injected in the superconductor with an excess energy that coincides with eV\, V being the bias voltage. Hence\, they must not lose energy in the banks and in the contact itself. The ideal condition is that of ballistic conduction through the N/S interface\, which ensures no Joule effect and requires in turns that the contact size is smaller than both the coherence length and the electronic mean free path in the superconductor.\nWhen these conditions are met\, the conduction through the contact is dominated by Andreev reflection\, a quantum phenomenon that is responsible for the conversion of the normal current into supercurrent\, and occurs in a specific range of voltages (electron energies) set by the amplitude of the superconducting gap. Several models have been proposed to describe the phenomenon and are currently used to extract information on the amplitude and symmetry of the order parameter from the spectra. The simplest one [4] was only suited for superconductors with an isotropic (s-wave) gap\, but has been successfully generalized to the case of layered materials with anisotropic gaps\, like cuprates [5\,6] or strontium ruthenate [7]) and finally to the 3D case\, while taking into account the shape of the actual Fermi surface [3]. The latter generalization allows calculating the point-contact spectrum for any symmetry of the order parameter\, including exotic ones with horizontal node lines.\nAfter discussing these general aspects\, I will briefly describe the application of the technique to some example materials\, from the conventional multiband superconductors MgB2 [8] to unconventional ones like Pu-based heavy fermion compounds [9] or Fe-based compounds [3]\, to transition-metal dichalcogenides [10]. \nReferences\n1. Y. G. Naidyuk and I. K. Yanson\, Point-Contact Spectroscopy\, Springer Series in Solid-State Sciences\, Vol. 145 (Springer\, 2004).\n2. D. Daghero and R.S. Gonnelli\, Supercond. Sci. Technol. 23\, 043001 (2010).\n3. D. Daghero et al.\, Rep. Prog. Phys. 74\, 124509 (2011).\n4. G. E. Blonder\, M. Tinkham and T. M. Klapwijk\, Phys. Rev. B 25\, 4515 (1982)\n5. Y. Tanaka and S. Kashiwaya\, Phys. Rev. Lett. 74\, 3451 (1995)\n6. S. Kashiwaya and Y. Tanaka\, Rep. Prog. Phys. 63\, 1641 (2000).\n7. M. Yamashiro\, Y. Tanaka\, and S. Kashiwaya\, Phys. Rev. B 56\, 7847 (1997)\n8. R. S. Gonnelli et al.\, Phys Rev. Lett. 89\, 247004 (2002)\n9. D. Daghero et al.\, Nature Communications 3\, 786 (2012)\n10. E. Piatti et al.\, Materials Today Physics 59 (2025) 101883 \n_ \nContact : matteo.dastuto@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/dario-daghero-department-of-applied-science-and-technology-politecnico-di-torino/
LOCATION:CNRS – Salle Louis Weil (E424)\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260630T103000
DTEND;TZID=Europe/Paris:20260630T113000
DTSTAMP:20260326T145855Z
CREATED:20260326T145827Z
LAST-MODIFIED:20260326T145855Z
UID:10000113-1782815400-1782819000@sfp-alpes.fr
SUMMARY:Carlotta PORZIO (CERN\, Switzerland)
DESCRIPTION:Experimental activities at the ISOLDE-CERN facility\nRésumé : \nThe ISOLDE factily at CERN is one of the world-leading laboratories for the production of radioactive ion beams (RIBs) with the ISOL (Isotope Separation On-Line) method. More than 1000 isotopes of over 70 chemical elements have been produced via the interaction of a 1.4 GeV proton beam with a variety of target materials. After ionization and mass separation\, the beams can be delivered at low energy or post-accelerated up to about 10 MeV/u using the HIE-ISOLDE linear accelerator. The facility supports a broad scientific program\, spanning nuclear structure studies\, nuclear astrophysics\, materials science\, life sciences\, and investigations of fundamental interactions. \nAmong the experimental setups available at HIE-ISOLDE\, the Miniball gamma-ray spectrometer is employed to investigate both collective and single-particle properties of exotic nuclei. Combined with the post-accelerated radioactive ion beams\, Miniball enables nuclear structure studies via Coulomb excitation and nucleon-transfer reactions. \nThis seminar will provide an introduction to the ISOLDE facility and the ISOL RIB production method\, and an overview of experimental setups and techniques\, with a focus on the Miniball spectrometer. \n— \nHanno Filter (College 3 Secretary \nExternal visitors may ask for a site access to tellier@ill.fr \n 
URL:https://sfp-alpes.fr/event/carlotta-porzio-cern-switzerland/
LOCATION:ILL – Salle de Séminaire (110-111)\, ILL 50 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260630T140000
DTEND;TZID=Europe/Paris:20260630T150000
DTSTAMP:20260625T132929Z
CREATED:20260625T132929Z
LAST-MODIFIED:20260625T132929Z
UID:10000203-1782828000-1782831600@sfp-alpes.fr
SUMMARY:Clàudia PEREZ JUNYENT (GCM’s Group\, Department of Physics\, & IMEM-BRT’s Group\, Department of Chemical Engineering\, Barcelona\, Spain)
DESCRIPTION:Dynamic disorder and phase behavior in long alkylammonium metal halides\nRésumé : \nwo-dimensional hybrid organic–inorganic perovskites with general formula (CₙH₂ₙ₊₁NH₃)₂MX₄ are promising solid-solid phase change materials (SS-PCMs) for thermal energy storage (TES) due to their sharp\, reversible first-order phase transitions with large latent heats. These transitions originate from cooperative order-disorder processes within the organic sublattice\, a mechanism known as pseudo-melting. As reported in the literature\, the transition temperature increases with alkyl chain length\, providing a means to tune the operating temperature. However\, long-chain compounds (n ≥ 16) have remained largely unexplored\, despite being expected to display transitions in the 80-110 °C range relevant for medium-temperature TES applications such as industrial waste heat recovery in food processing\, textiles and paper sectors. \nWhile calorimetric measurements confirm the thermodynamic potential of these materials\, the microscopic mechanisms driving the phase transitions remain poorly understood\, particularly for long chains (n ≥ 16). Establishing a molecular-level description of the order–disorder process is essential to understand what governs the transition temperature and latent heat\, and to rationally design materials with improved thermal performance. In this work\, we address this gap through a comprehensive characterization combining calorimetry\, vibrational spectroscopy\, and neutron scattering of newly synthesized (CₙH₂ₙ₊₁NH₃)₂CuBr₄ compounds with even n = 16-22. Variable-temperature Fourier-transform infrared spectroscopy identifies conformational rearrangements of the alkyl chains across the transition\, evidencing changes in intra- and intermolecular interactions consistent with enhanced chain mobility. Variable-temperature Raman spectroscopy tracks the evolution of vibrational modes associated with both the organic chains and the inorganic framework. Quasielastic neutron scattering directly probes hydrogen dynamics\, revealing a progressive activation of molecular motion near of the phase transition and confirming that dynamic disorder is the microscopic origin of the large latent heat. Together\, these results provide molecular-level understanding of structure–property relationships in long-chain hybrid perovskites needed to guide the design of tunable SS-PCMs for medium-temperature TES. \n_ \nGabriel Cuello (College 6 Secretary) \nExternal visitors may ask for a site access to Brigitte Dubouloz (dubouloz@ill.fr) \n  \n  \n 
URL:https://sfp-alpes.fr/event/claudia-perez-junyent-gcms-group-department-of-physics-imem-brts-group-department-of-chemical-engineering-barcelona-spain/
LOCATION:ILL – Salle de Séminaire (110-111)\, ILL 50 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260702T113000
DTEND;TZID=Europe/Paris:20260702T123000
DTSTAMP:20260625T134330Z
CREATED:20260625T134330Z
LAST-MODIFIED:20260625T134330Z
UID:10000204-1782991800-1782995400@sfp-alpes.fr
SUMMARY:Soleiman SHOKUR (EPFL\, Lausanne)
DESCRIPTION:Clinical and Functional Benefits of Prosthetics with Multimodal Feedback\nRésumé : \nSomatosensory feedback in prosthetics has advanced considerably\, with invasive and non-invasive approaches now capable of evoking touch and proprioceptive sensations. Yet modalities have largely been studied in isolation\, and thermotactile feedback — the simultaneous combination of touch and temperature — remains unachieved. This is a critical gap : natural touch is inherently multimodal\, and temperature is not merely a tool for object interac4on but a continuous signal through which we monitor our own body. Its absence from prosthetic feedback represents a fundamental impoverishment of the sensory input the brain expects. In this talk\, I will present recent advances in multimodal sensory feedback and discuss its benefits not only for improving prosthetic function and dexterity\, but also for addressing key clinical consequences of amputation — including phantom limb pain and body perception distortion. \n_ \nContact : homaira.nawabi@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/soleiman-shokur-epfl-lausanne/
LOCATION:GIN – Amphi Serge Kampf\, Grenoble Institut des Neurosciences (GIN) Bât. Edmond J. Safra\, Chemin Fortune Ferrini CHU\, La Tronche\, 38700\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260703T110000
DTEND;TZID=Europe/Paris:20260703T120000
DTSTAMP:20260625T135922Z
CREATED:20260625T135922Z
LAST-MODIFIED:20260625T135922Z
UID:10000205-1783076400-1783080000@sfp-alpes.fr
SUMMARY:Carlos MEJUTO-ZAERA (LPT Toulouse)
DESCRIPTION:Recovering a band structure picture for correlated electrons\nRésumé : \nArguably one of the central pieces in solid state physics is band structure theory. This provides an interpretable formalism to rationalize and predict the behavior of electrons in periodic systems in terms of effective\, non-interacting models. Thanks to efficient computational frameworks leveraging band structures\, particularly Kohn-Sham density functional approximations\, theory plays an important role in the exploration and design of functional materials. Unfortunately\, the situation is more challenging when it comes to leveraging strongly correlated electrons. Their immense potential for device design is fundamentally more difficult to chart\, as theoretical and computational models for them traditionally need to abandon the band structure picture. \nAmong these approaches\, the ghost Gutzwiller (gGut) framework has recently emerged as a versatile alternative to well established\, computationally intensive methods. gGut is a variational Ansatz which can be formulated as a local embedding. Crucially\, by introducing auxiliary orbitals\, it can describe correlated electrons in lattices and molecules in terms of effectively non-interacting quasiparticles\, recovering a band structure picture valid for strong correlation. Here\, we will discuss two recent gGut applications: the proposal of an interaction-driven mechanism for altermagnetism and the description of topological properties in correlated materials. In the former\, the interplay between van Hove itinerant magnetism and local exchange interactions leads to a homogeneous altermagnetic spin ordering. In the latter\, the quasiparticle picture underlying gGut allows the immediate use of markers developed for non-interacting systems to describe correlated topology. These examples show how gGut can provide transparent descriptions of correlated phenomena in terms of non-interacting quasiparticles. \n_ \nContact : jeanne.colbois@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/carlos-mejuto-zaera-lpt-toulouse/
LOCATION:LPMMC – salle Roger Maynard (G421)\, CNRS - LPMMC 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260703T110000
DTEND;TZID=Europe/Paris:20260703T120000
DTSTAMP:20260703T084805Z
CREATED:20260626T133757Z
LAST-MODIFIED:20260703T084805Z
UID:10000210-1783076400-1783080000@sfp-alpes.fr
SUMMARY:Catherine ROYER (Rensselaer Polytechnic Institute\, New York)
DESCRIPTION:Pressure-based mapping of protein conformational landscapes\nRésumé : \nProtein function depends upon dynamics\, and while in recent years great progress has been made in predicting protein structure from sequence\, the sequence determinants of functional dynamics have yet to be defined. We have developed an approach using a combination of high-pressure NMR\, SAXS\, fluorescence\, and computation to locally and globally map protein stability and functional dynamics. On a model repeat protein system we find that single amino acid substitutions lead to large changes in local stability and apparent folding cooperativity\, while global stabilities of the variant proteins are similar. In the case of the Arf GTPases\, which undergo massive conformational changes during their nucleotide switch transition\, we demonstrated that the switch mechanism implicates the population of a functional molten globule. Moreover\, we discovered the sequence determinants of back-to-front allosteric control of the switch that differentiates switching probabilities of the Arf family members\, and likely many other small GTPases. \n_ \nCes séminaires\, ainsi que les soutenances et cours sont ouverts à tous\, notez toutefois que l’accès au campus EPN nécessite un avis de rendez-vous. Merci de remplir ce formulaire et de l’adresser\, plus de 48h à l’avance\, à ce contact. Pensez à vous munir d’une pièce d’identité le jour de votre visite.
URL:https://sfp-alpes.fr/event/catherine-royer-rensselaer-polytechnic-institute-new-york/
LOCATION:IBS – Salle des séminaires\, IBS 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IBS":MAILTO:ibs.seminaires@ibs.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260706T110000
DTEND;TZID=Europe/Paris:20260706T120000
DTSTAMP:20260702T131525Z
CREATED:20260702T131457Z
LAST-MODIFIED:20260702T131525Z
UID:10000212-1783335600-1783339200@sfp-alpes.fr
SUMMARY:Guillaume MESTDAGH (INRIA Montbonnot)
DESCRIPTION:Coupling osmosis and mechanics in vertex-based models for plant tissue growth\nRésumé : \nUnderstanding plant growth is fundamental to address global challenges such as food security\, biodiversity\, and soil‑erosion control. The development of plants involves many interconnected physical processes\, occurring at various spatial and temporal scales\, making modeling an indispensable complement to experiments. In particular\, discrete vertex-based models have successfully described the coupling between inter-cell water fluxes and mechanical deformations of cell walls\, in response to a prescribed inner water pressure. \nA two-dimensional vertex-based model represents a group of cells as a tiling of polygons\, with the edges between polygons representing cell walls. Existing vertex-based models postulate a fixed water pressure inside cells as the force driving growth. In reality\, this inner pressure itself is the consequence of osmosis\, a chemical process by which water is attracted into cells with a higher concentration of solute. However\, capturing the interplay between mechanics and solute dynamics in plant tissues into one model remains a challenge that requires novel mathematical frameworks. \nIn this talk\, I will present a new approach to couple solute and water fluxes with mechanics and growth in vertex-based models. The proposed approach is based on a variational formalism where the system physics is described in terms of free energy and dissipation function. After building the model and deriving the evolution equations of the system\, I will show that the resulting formulation can be turned into a numerical method. Finally\, I will illustrate the model properties through a few numerical simulations and discuss its interest for the study of plant growth. \nContact : philippe.marmottant@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/uillaume-mestdagh-inria-montbonnot/
LOCATION:LiPhy – Salle de conférence\, LiPhy 140 avenue de la Physique\, St Martin d'Hères\, 38402\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260707T110000
DTEND;TZID=Europe/Paris:20260707T120000
DTSTAMP:20260702T132320Z
CREATED:20260702T132320Z
LAST-MODIFIED:20260702T132320Z
UID:10000213-1783422000-1783425600@sfp-alpes.fr
SUMMARY:Jérémie TOPIN (Department of Chemistry\, Université Côte d'Azur\, Nice)
DESCRIPTION:The molecular language of smell : reading odors through receptors\nRésumé : \nThis morning\, you may have enjoyed a cup of coffee or tea and felt that its aroma had stimulated your sense of smell. The volatile molecules in your favourite beverage are recognized by the olfactory receptors (ORs) expressed in your olfactory epithelium. But among your 400 ORs\, which ones were activated by these molecules ?\nTo answer this question\, and more generally to determine the molecular recognition spectrum of ORs\, we design the Molecule to Olfactory Receptor M2OR database\n(https://m2or.chemsensim.fr/)\, which brings together 75\,050 bioassay experiments for 51\,683 distinct OR-molecule pairs.[1] We further combine protein language[2] with graph neural networks to predict OR activation\, and propose a tailored architecture incorporating inductive biases from the protein-molecule interaction.[3] This model outperforms state-of-the-art drug- target interaction prediction models as well as standard GNN baselines. Notably\, our predictions are in agreement with combinatorial coding theory in olfaction. \nReferences\n[1] Lalis\, M.\, Hladiš\, M.\, Khalil\, S. A.\, Briand\, L.\, Fiorucci\, S.\, & Topin\, J\, 2024. M2OR: a database of olfactory receptor–odorant pairs for understanding the molecular mechanisms of olfaction. Nucleic Acids Research\, 52(D1)\, D1370-D1379.\n[2] Elnaggar\, A.\, Heinzinger\, M.\, Dallago\, C.\, Rehawi\, G.\, Wang\, Y.\, Jones\, L.\, … & Rost\, B. (2021). Prottrans: Toward understanding the language of life through self-supervised learning. IEEE transactions on pattern analysis and machine intelligence 2022\, 44(10)\, 7112-7127.\n[3] Hladiš\, M.\, Lalis\, M.\, Fiorucci\, S.\, & Topin\, J. Matching receptor to odorant with protein language and graph neural networks 2023. In The Eleventh International Conference on Learning Representations. \nContact : lucie.sancey@univ-grenoble-alpes.fr ou emmanuel.brun@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/jeremie-topin-department-of-chemistry-universite-cote-dazur-nice/
LOCATION:IAB – Salle de séminaire\, IAB Site Santé - Allée des Alpes\, La Tronche\, 38700\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IAB":MAILTO:appaixfl@univ-grenoble-alpes.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260707T140000
DTEND;TZID=Europe/Paris:20260707T150000
DTSTAMP:20260702T133156Z
CREATED:20260702T133156Z
LAST-MODIFIED:20260702T133156Z
UID:10000214-1783432800-1783436400@sfp-alpes.fr
SUMMARY:Axel ROUVILLER (Post-doctorant)
DESCRIPTION:Electromecanical characterization of Cu2O nanowire networks\nRésumé : \nOne of the main obstacles to the development of new electronic devices\, such as photovoltaic panels\, LEDs\, smart windows\, is the lack of p-type semiconductors combining both high electrical conductivity values and transparence in the visible range. Studies carried out at the LMGP laboratory have demonstrated the possibility of forming\, by aerosol-assisted chemical vapor deposition (AACVD)\, Cu2O/CuCrO2 nanocomposites in which Cu2O nanograins are contained in a CuCrO2 matrix. These p-type semiconductor nanostructures turned out to have promising optoelectronic properties\, with an average visible transmittance of 55% and an electrical resistivity of 0.05 Ω.cm [1]. The NANOCOMPOSITE project\, supported by the ANR\, aims to develop the elaboration of this type of nanostructure in a controlled manner\, by covering Cu2O nanowire networks\, synthesized by hydrothermal process\, with a thin layer of CuCrO2\, deposited by AACVD. The work in this presentation is part of this project and concerns the development by Felhing reaction method of Cu2O nanowire networks of different densities on silicon substrates. Once these networks were characterized\, they were deposited on flexible kapton substrates\, which allowed for electrical measurements to be carried out under mechanical stress\, using a traction plate at the SIMaP laboratory. \nShort Bio/CV \nI completed my thesis at the university of Caen (France) in the CIMAP laboratory. During my PhD\, I worked on the growth and characterization of both SrVO3 and Sr2V2O7 thin films\, using reactive sputtering deposition technique\, for opto-electronics applications. Since February 2026\, I joined the NANOCOMPOSITE ANR project\, coordinated by Jean-Luc Deschanvres\, as a Post-Doc. My work on this project consists\, firstly\, in the elaboration of Cu2O nanowire networks on flexible substrates by hydrothermal growth process at LMGP laboratory. Once these depositions have been performed\, I carry out electromecanical characterizations of these nanowires at SIMaP laboratory in order to evaluate their compatibility and adequateness as flexible P-type semiconductors. \nContact : deborah.verger@grenoble-inp.fr
URL:https://sfp-alpes.fr/event/axel-rouviller-post-doctorant/
LOCATION:LMGP – salle des séminaires\, Grenoble INP -Phelma 3 parvis Louis Néel\, Grenoble\, 38054\, France
CATEGORIES:Séminaire
ORGANIZER;CN="LMGP":MAILTO:deborah.verger@grenoble-inp.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260710T110000
DTEND;TZID=Europe/Paris:20260710T120000
DTSTAMP:20260703T084646Z
CREATED:20260626T134823Z
LAST-MODIFIED:20260703T084646Z
UID:10000211-1783681200-1783684800@sfp-alpes.fr
SUMMARY:Marion JESPERSEN (Department of Microbiology\, Monash University)
DESCRIPTION:Functional and structural insights into O2-adapted hydrogenases\nRésumé : \nHydrogenases are metalloenzymes that catalyse the interconversion of protons and electrons into molecular hydrogen (H2)\, providing valuable models for robust and sustainable H2 catalysts. However\, most characterised hydrogenases are inhibited by oxygen (O2)\, limiting their biotechnological potential. Although diverse [NiFe]- and [FeFe]-hydrogenases have evolved adaptations that support activity\, stability\, or recovery following O2 exposure\, the molecular basis of O2 adaptation remains poorly understood. \nIn this talk\, I will present our ongoing work on O2-adapted hydrogenases from bacteria and archaea inhabiting aerobic soils\, thermoacidophilic environments\, and the gut. By combining physiological\, biochemical\, structural\, and computational approaches\, we investigate how distinct hydrogenase lineages support H2 metabolism under oxygen-exposed conditions.These systems include the high-affinity group 1h [NiFe]-hydrogenase from Mycobacterium smegmatis\, the Sulfolobales clade 2 [NiFe]-hydrogenase from Metallosphaera sedula\, and gut microbial [FeFe]-hydrogenases\, including group B enzymes from Bacteroides species and a group A1 enzyme from Clostridium perfringens. Together\, they highlight the diversity of hydrogenase architectures\, cofactor arrangements\, and electron-transfer strategies that may contribute to O2 resilience. \nOverall\, this work expands the functional and structural repertoire of O2-adapted hydrogenases\, informing our understanding of microbial H2 metabolism and the search for enzymes suited to H2-based biocatalysis. \n_ \nCes séminaires\, ainsi que les soutenances et cours sont ouverts à tous\, notez toutefois que l’accès au campus EPN nécessite un avis de rendez-vous. Merci de remplir ce formulaire et de l’adresser\, plus de 48h à l’avance\, à ce contact. Pensez à vous munir d’une pièce d’identité le jour de votre visite.
URL:https://sfp-alpes.fr/event/marion-jespersen-department-of-microbiology-monash-university/
LOCATION:IBS – Salle des séminaires\, IBS 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IBS":MAILTO:ibs.seminaires@ibs.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260720T110000
DTEND;TZID=Europe/Paris:20260720T120000
DTSTAMP:20260703T133346Z
CREATED:20260703T133346Z
LAST-MODIFIED:20260703T133346Z
UID:10000216-1784545200-1784548800@sfp-alpes.fr
SUMMARY:Garry S. HANAN (Département de chimie\, Université de Montréal\, Canada)
DESCRIPTION:Developing New Photosensitizers based on Transition Metal Ions for Green Energy Applications\nRésumé : \nRising global population and increased CO2 levels in the atmosphere have focused attention on developing alternative and widely available carbon-free energy sources (1\,2). Ourresear ch focuses on harnessing the unique properties of excited states in metal complexes to drive self-assembly processes and develop innovative energy applications. By leveraging the photophysical and photochemical behaviors of these complexes\, we explore how light-induced excitations can be utilized to control molecular organization and energy transfer at the nanoscale. The parallels with Natural Photosynthesis are evident: light energy is captured by self-assembled Light Harvesting Complexes and is channeled to a reaction centre which induces electron transfer and the eventual production of chemical energy (3). \nOur approach involves the synthesis of polypyridyl-based metal complexes\, which are known for their stability and tunable electronic properties. By manipulating the excited states of these complexes\, we demonstrate how light can act as a stimulus to induce self-assembly\, leading to the formation of well-defined nanostructures with potential applications in catalysis\, sensing\, and optoelectronics (4). Additionally\, we extend our approach to the development of photoactive molecular devices capable of storing and transferring electrons\, offering insights into the design of next-generation photosensitizers for chemical energy production (5). We have also moved from second- and third-row transition metal ions to the first row\, and explore energy applications of these abundant\, inexpensive and relatively non-toxic metal ions (6). \nReferences\n1. https://ourworldindata.org/world-population-growth (01-05-2026).\n2. https://www.iea.org/world (01-05-2026).\n3. V. Balzani\, A. Credi\, M. Venturi\, Chem Sus Chem 2008\, 1\, 26.\n4. B. Laramée-Milette\, F. Puntoriero\, F. Nastasi\, S. Campagna\, G. S. Hanan\, Chem. Eur. J.\, 2017 23\, 16497.\n5. G. M. Mercier\, E. Rousset\, I. Oubaha\, K. Bandyopadhyay\, A. K. Pal\, I. Ciofini\, L.-M. Chamoreau\, V. Marvaud\, G. S. Hanan\, Chem. Commun. 2025 61 (77)\, 14911-14914.\n6. A. Saha\, G. Turner\, M. Cibian\, S. Serroni\, S. Genovese\, S. Campagna\, G. S. Hanan\, F. Nastasi\, submitted for publication. \nGarry Hanan is professor in the Department of Chemistry at the Université de Montréal\, where he leads the Green Energy Group and is a member of the Centre for Green Chemistry and Catalysis. He earned his B. Sc. from the University of Winnipeg\, Canada\, his PhD from Université Louis Pasteur in Strasbourg\, France\, under the supervision of Jean-Marie Lehn and subsequently conducted postdoctoral studies in Germany with Manfred T. Reetz and in Italy with Vincenzo Balzani and Sebastiano Campagna. Professor Hanan’s research focuses on the design and synthesis of supramolecular photocatalysts capable of harvesting solar energy to drive chemical\ntransformations\, most notably the photoproduction of fuels via water-splitting (producing H₂) and CO₂ reduction.\nHe has received numerous distinctions\, including awards from IUPAC and NSERC\, highlighting his contributions to sustainable chemistry and molecular materials science. He also actively promotes international student exchange. \nContact : frederique.loiseau@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/garry-s-hanan-departement-de-chimie-universite-de-montreal-canada/
LOCATION:DCM – Salle C209\, DCM - Bât Chimie Recherche 301 rue de la Chimie\, St Martin d'Hères\, 38400\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260721T140000
DTEND;TZID=Europe/Paris:20260721T150000
DTSTAMP:20260709T121303Z
CREATED:20260709T121303Z
LAST-MODIFIED:20260709T121303Z
UID:10000218-1784642400-1784646000@sfp-alpes.fr
SUMMARY:Ben HUMPHREYS (Institut Laue-Langevin (ILL) Grenoble\, France)
DESCRIPTION:Advancing our Understanding of Responsive Polymer Brushes\nRésumé : \n\nInterfacial properties of a surface can be extensively modified through the addition of a polymer brush layer; a dense array of end-tethered polymers grafted to a surface. When a polymer brush is synthesised with a stimulus responsive polymer\, the surface properties can be tailored to respond\, often reversibly\, to external stimuli such as temperature\, light\, pH\, solvent or electric fields. While these so-called smart materials are particularly promising for high-value applications such as sensors\, nanoactuation and microfluidics\, their response can be significantly influenced by additives such as osmolytes and salts. Unlike untethered polymer systems\, research into the influence of additives for responsive polymer brushes has been sparse\, yet this knowledge is crucial when advancing their utilisation in biomedical and industrial applications. \nThroughout my research career I have primarily focused on the influence of salts and osmolytes on temperature and pH responsive homo- and co-polymer brushes. I will firstly discuss my synthetic methodologies and choice of responsive polymers. This will be followed by a comprehensive outline of the approaches used to investigate these responsive coatings. Here\, starting with the simplest systems\, then gradually increasing complexity\, I have been able to systematically understand the influence of individual additives/changes. This information is invaluable when considering the complex real-world applications that can benefit from the utilisation of smart\, responsive polymer brush surface coatings. \nShort Bio/CV\nIn 2015 I graduated from the University of Newcastle\, Australia\, with a Bachelor of Science\, 1st class honors\, majoring in Chemistry\, followed by my PhD at the same university (2015-2019) titled “Nanostructure of Temperature Responsive Polymer Brushes Modulated by Salt Identity”. I then accepted a post-doc position at Lund University in Sweden\, investigating the internal structural changes of a triglyceride film throughout enzymatic digestion\, with particular focus on the influence of pH and how this influences the species present throughout the lipolytic process. In 2023 I started in my current position as instrument responsible for the D17 neutron reflectometer at the ILL where I have re-established my research on responsive polymer brushes with a focus on osmolyte and salt additives in aqueous solutions. \n_ \nContact : deborah.verger@grenoble-inp.fr
URL:https://sfp-alpes.fr/event/ben-humphreys-institut-laue-langevin-ill-grenoble-france/
LOCATION:LMGP – salle des séminaires\, Grenoble INP -Phelma 3 parvis Louis Néel\, Grenoble\, 38054\, France
CATEGORIES:Séminaire
ORGANIZER;CN="LMGP":MAILTO:deborah.verger@grenoble-inp.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260831T140000
DTEND;TZID=Europe/Paris:20260831T150000
DTSTAMP:20260709T120641Z
CREATED:20260709T120641Z
LAST-MODIFIED:20260709T120641Z
UID:10000217-1788184800-1788188400@sfp-alpes.fr
SUMMARY:Sasha CHERNYSHEV (University of California\, Irvine\, USA)
DESCRIPTION:BaCo₂(AsO₄)₂ : Strong Kitaev\, After All\nRésumé : \nBaCo₂(AsO₄)₂ – a magnetic compound first studied some 50 years ago—has long been a mystery. Its spectrum is incompatible with the theory that this material was supposed to verify\, and its magnetic order is discrepant and easily destroyed by an exceptionally low magnetic field. All these traits have perplexed theorists and experimentalists alike. The mystery had to wait for breakthroughs such as the development of the novel concept of « Kitaev magnetism » in the late 2000s. It had to wait even longer as the first\, more obvious Kitaev candidates were studied\, before researchers turned their attention to the cobaltate family. Only recently did the stars align to enable a comprehensive analysis of this enduring enigma. Our work [1] has provided exactly that: it propelled BaCo₂(AsO₄)₂ to the forefront of research as a champion among Kitaev magnets\, while bringing its multifaceted conundrums close to a complete resolution by reconciling its puzzling magnetic state\, spectrum\, and low critical field with the phenomenology of the proposed model. \n[1] P. A. Maksimov\, S. Jiang\, L. P. Regnault\, and A. L. Chernyshev\, Phys. Rev. Lett. 135\, 066703 (2025). (Editors’ Suggestion). \n_ \nArno Hiess (College 4 Secretary) \nExternal visitors may ask for a site access to tellier(at)ill.fr \nZoom link : https://ill.zoom.us/j/94822992547?pwd=STd44Z3otZU5k1DXbwobbeLtQPJJq2.1 – Password : SeminarC4
URL:https://sfp-alpes.fr/event/sasha-chernyshev-university-of-california-irvine-usa/
LOCATION:ILL – Salle de Séminaire (110-111)\, ILL 50 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260901T140000
DTEND;TZID=Europe/Paris:20260901T150000
DTSTAMP:20260827T151536Z
CREATED:20260827T151536Z
LAST-MODIFIED:20260827T151536Z
UID:10000223-1788271200-1788274800@sfp-alpes.fr
SUMMARY:Tomáš NOVOTNY (Charles University\, Praha\, Czech Republic)
DESCRIPTION:Theoretical approaches to correlated quantum dots coupled to superconducting leads\nRésumé : \nI will present a brief overview of relatively simple theoretical approaches developed in our Prague group in past several years and applied to the problem of description of correlated quantum dots attached to the BCS superconducting leads. As a thorough Quantum Monte Carlo analysis (1) of the experimental data (2) showed realistic experimental setups can be even quantitatively captured by the Single Impurity Anderson Model (SIAM) with superconducting leads. Pioneering semi-analytical approaches have not matched the so far employed heavy numerical tools such as Numerical Renormalization Group (NRG) and/or Quantum Monte Carlo (QMC) in the ability of quantitatively predicting the properties of this model. However\, we have shown that self-consistent perturbation expansion up to the second order in the interaction strength (3) yields at zero temperature and for a wide range of other parameters excellent results for the position of the 0 − π impurity quantum phase transition boundary and the Josephson current as well as the energy of Andreev bound states in the 0-phase. Furthermore\, we have discovered exact identities connecting symmetric and asymmetric coupling situations which significantly reduce computational requirements in experimentally generic asymmetric setups (4) and provided simple approximate analytical formulas for the fitting of the phase boundaries from finite-temperature experimental data (5). I will also briefly mention an exact mapping of a half-filled superconducting SIAM onto a normal SIAM with a structured semiconducting lead which simplifies some technical aspects of its NRG solution significantly (6) and a simple way of determination of the quantum critical point from finite-temperature QMC statistics (7). Finally\, the most recent extensions of those methods to more quantum dots (8) or superconducting leads (9) will be mentioned. \n(1) David J. Luitz\, Fakher F. Assaad\, Tomáš Novotný\, Christoph Karrasch\, and Volker Meden\, Understanding the Josephson current through a Kondo-correlated quantum dot\, Phys. Rev. Lett. 108\, 227001 (2012).\n(2) H. Ingerslev Jørgensen\, T. Novotný\, K. Grove-Rasmussen\, K. Flensberg\, and P. E. Lindelof\, Critical Current 0-π Transition in Designed Josephson Quantum Dot Junctions\, Nano Lett. 7 (8)\, 2441 (2007).\n(3) M. Žonda\, V. Pokorný\, V. Janiš\, and T. Novotný\, Perturbation theory of a superconducting 0-π impurity quantum phase transition\, Scientific Reports 5\, 8821(2015); Perturbation theory for an Anderson quantum dot asymmetrically attached to two superconducting leads\, Phys. Rev. B 93\, 024523 (2016).\n(4) Alžběta Kadlecová\, Martin Žonda\, and Tomáš Novotný\, Quantum dot attached to superconducting leads: Relation between symmetric and asymmetric coupling\, Phys. Rev. B 95\, 195114 (2017).\n(5) Alžběta Kadlecová\, Martin Žonda\, Vladislav Pokorný\, and Tomáš Novotný\, Practical Guide to Quantum Phase Transitions in Quantum-Dot-Based Tunable Josephson Junctions\, Phys. Rev. Applied 11\, 044094 (2019).\n(6) Peter Zalom\, Vladislav Pokorný\, and Tomáš Novotný\, Spectral and transport properties of a half-filled Anderson impurity coupled to phase-biased superconducting and metallic leads\, Phys. Rev. B 103\, 035419 (2021); Peter Zalom and Tomáš Novotný\, Tunable reentrant Kondo effect in quantum dots coupled to metal-superconducting hybrid reservoirs\, Phys. Rev. B 104\, 035437 (2021).\n(7) V. Pokorný and T. Novotný\, Footprints of impurity quantum phase transitions in quantum Monte Carlo statistics\, Phys. Rev. Research 3\, 023013 (2021).\n(8) M. Žonda\, P. Zalom\, T. Novotný\, G. Loukeris\, J. Bätge\, and V. Pokorný\, Generalized atomic limit of a double quantum dot coupled to superconducting leads\, Phys. Rev. B 107\, 115407 (2023).\n(9) Peter Zalom\, Martin Žonda\, and Tomáš Novotný\, Hidden Symmetry in Interacting-Quantum-Dot-Based Multiterminal Josephson junctions\, Phys. Rev. Lett. 132\, 126505 (2024). \n_ \nContact : equipe-seminaires-nano@listes.grenoble.cnrs.fr
URL:https://sfp-alpes.fr/event/tomas-novotny-charles-university-praha-czech-republic/
LOCATION:CNRS – Salle Rémy Lemaire (K223)\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260904T110000
DTEND;TZID=Europe/Paris:20260904T120000
DTSTAMP:20260828T125150Z
CREATED:20260828T125150Z
LAST-MODIFIED:20260828T125150Z
UID:10000232-1788519600-1788523200@sfp-alpes.fr
SUMMARY:Sara MATYAS​ (Ingénieur innovation)​ & Stéphanie CELIS-JUAREZ (CNRS\, Direction des Relations Territoriales\, DR11)
DESCRIPTION:La Valorisation : quels dispositifs d’accompagnement au CNRS ?\nRésumé : \nLors de ce séminaire\, les dispositifs d’accompagnement en valorisation proposés par le CNRS vous seront présentés. Une opportunité de mieux connaitre les guichets de financement mais aussi de reparler de la déclaration d’invention\, point de départ de toute démarche de valorisation. \nLes guichets Prématuration CNRS et PUI\, Programme PISE\, Programme RISE vous seront notamment présentés\, ainsi que des Programmes de financement 2027 ciblant des projets à impacts sociétaux et environnementaux. \nEnfin\, un temps d’échange avec les oratrices permettra de répondre aux questions relatives à vos projets. \n_ \n\nLes séminaires et soutenances sont ouverts à tous\, notez toutefois que l’accès au campus EPN nécessite un avis de rendez-vous. Merci de remplir ce formulaire  et de l’adresser\, plus de 48h à l’avance\, à ce contact.\nPensez à vous munir d’une pièce d’identité le jour de votre visite.
URL:https://sfp-alpes.fr/event/sara-matyas-ingenieur-innovation-stephanie-celis-juarez-cnrs-direction-des-relations-territoriales-dr11/
LOCATION:IBS – Salle des séminaires\, IBS 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IBS":MAILTO:ibs.seminaires@ibs.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260908T110000
DTEND;TZID=Europe/Paris:20260908T120000
DTSTAMP:20260903T153516Z
CREATED:20260903T153408Z
LAST-MODIFIED:20260903T153516Z
UID:10000238-1788865200-1788868800@sfp-alpes.fr
SUMMARY:Delphine DELACOUR (IBDM \, Marseille (France))
DESCRIPTION:Deciphering the principles of epithelial tissue organization\nRésumé : \nEpithelia constitute the primary physical barrier against external insults while simultaneously ensuring organ function. Defects in epithelial assembly or function lead to a broad spectrum of pathological conditions\, ranging from rare developmental disorders to cancer. Despite their fundamental importance\, the mechanisms by which epithelial cells coordinate individual behaviors across entire tissues to ensure spatial organization\, integrity\, and function remain poorly understood. To date\, epithelial coherence has been studied predominantly in invertebrate systems or in transformed cell lines\, limiting our understanding of its regulation in physiological mammalian contexts.\nThe intestinal epithelium represents an exceptional model to address these questions. It is one of the most rapidly renewing tissues in mammals and is continuously exposed to challenges. Its homeostasis relies on the precise balance between cell proliferation\, differentiation\, migration\, and death. However\, the cellular and developmental principles governing intestinal tissue organization and maintenance remain largely unexplored. \nThe overarching objective of this project is to elucidate how functional domains of the intestinal epithelium are established\, maintained\, and coordinated in space and time. Specifically\, the project aims to : \n1. understand the mechanisms that preserve the integrity of the proliferative compartment and determine their role in crypt formation and maintenance ;\n2. uncover epithelial connectivity and collective behavior within the differentiated compartment\, both under homeostatic conditions and in response to perturbations. \nA major strength of this project lies in its integrative and comparative strategy\, combining in vivo and in vitro murine models with human disease-relevant systems. The project brings together advanced approaches in cell and developmental biology\, tissue engineering\, histology\, molecular biology\, biophysics\, and computational modeling. This multidisciplinary framework will enable the identification of adaptive mechanisms by which epithelial cells polarize\, self-organize\, and dynamically regulate their fate in response to their environment\, with broad implications for developmental biology\, regenerative medicine\, and disease pathology. \n_ \nContact : monika.dolega@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/delphine-delacour-ibdm-marseille-france/
LOCATION:IAB – Salle de séminaire\, IAB Site Santé - Allée des Alpes\, La Tronche\, 38700\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IAB":MAILTO:appaixfl@univ-grenoble-alpes.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260908T140000
DTEND;TZID=Europe/Paris:20260908T150000
DTSTAMP:20260827T152108Z
CREATED:20260827T152108Z
LAST-MODIFIED:20260827T152108Z
UID:10000224-1788876000-1788879600@sfp-alpes.fr
SUMMARY:Paul CANFIELD (Ames Laboratory\, Iowa State University\, Ames\, Iowa 50010\, USA)
DESCRIPTION:Negotiations with Nature — What happens when a Physicist tries to be a Chemist\nRésumé : \nOver the past 30 plus years my group has made over 10\,000 solution growth attempts to grow or explore 1\,000’s of different compounds or phase spaces. Over the past decade we have been developing a variety of different algorithms for identifying and accessing poorly explored spaces\, partly with an eye toward discovering new phases\, partly with an eye toward discovering new electrical or magnetic phase transitions and ground states. In this talk I will try to address the basic research questions of\, “where should I look for new materials or physics?” and “how can I enhance my chances of discovering X\, Y\, or Z (where XYZ can be your favorite state\, structure or behavior)?”. Specific examples spanning superconductors\, quasicrystals\, heavy fermions\, fragile magnets\, topological electronic systems\, local moment magnets and a few lost puppies will be given and reviewed. \n_ \nContact : jean-pascal.brison@cea.fr
URL:https://sfp-alpes.fr/event/paul-canfield-ames-laboratory-iowa-state-university-ames-iowa-50010-usa/
LOCATION:GreenER – Amphi Bergès\, GreenER\, 21 avenue des Martyrs\, Grenoble\, 38031\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260910T143000
DTEND;TZID=Europe/Paris:20260910T153000
DTSTAMP:20260904T141514Z
CREATED:20260904T141514Z
LAST-MODIFIED:20260904T141514Z
UID:10000240-1789050600-1789054200@sfp-alpes.fr
SUMMARY:Kayla NGUYEN (Oregon University)
DESCRIPTION:Three-Dimensional Atomic Reconstruction using Electron Ptychography\nRésumé : \nElectrons play a pivotal role in stabilizing matter\, but they are also tools that can reveal the underlying physics of complex systems from high energy physics to condensed matter. Electrons can be used as imaging probes\, where properties of matter such as magnetism or topology can be observed atom-by-atom.  In this talk\, I will show how electron ptychography\, a computational phase retrieval technique\, can improve resolution beyond the numerical aperture of electromagnetic lenses and reveal atomic structures in three-dimensions.  In particular\, I use this ‘computation lens’ approach on Er: CeO2 nanocrystals and thin films with dramatically different crystallographic orientations to uncover dopants\, defects and strain with picometer precision.  Ptychography can also be extended to visualize topological magnetism in three dimensions.  Here\, I will devise an approach to image magnetic structures of centrosymmetric skyrmions grown from amorphous FeGePt; here\, internal Bloch domains with Néel caps can be reconstructed\, as predicted from micromagnetic simulations. For non-idealized emergent materials\, solving the atomic or magnetic structure in three dimensions can support results from density functional theory\, micromagnetic simulations and enable a deeper understanding of a system’s physical properties. \n_ \nContact : martien.den-hertog@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/kayla-nguyen-oregon-university/
LOCATION:CNRS – Salle Erwin Bertaut (F418)\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260911T110000
DTEND;TZID=Europe/Paris:20260911T120000
DTSTAMP:20260827T154120Z
CREATED:20260827T154120Z
LAST-MODIFIED:20260827T154120Z
UID:10000226-1789124400-1789128000@sfp-alpes.fr
SUMMARY:Alexander BRONSTEIN (Institute of Science & Technology\, Autriche)
DESCRIPTION:Experiment-guided generative models for protein structure and dynamics\nRésumé : \n\nProteins exist as a dynamic ensemble of multiple conformations\, and these motions are often crucial for their functions. However\, current structure prediction methods predominantly yield a single conformation\, overlooking the conformational heterogeneity revealed by diverse experimental modalities. I will present a framework for building experiment-grounded protein structure generative models that infer conformational ensembles consistent with measured experimental data. The key idea is to treat state-of-the-art protein structure predictors (e.g.\, AlphaFold3) as sequence-conditioned structural priors\, and cast ensemble modeling as posterior inference of protein structures given experimental measurements. Through extensive real-data experiments\, I will demonstrate the generality of our method to incorporate a variety of experimental measurements. In particular\, our framework uncovers previously unmodeled conformational heterogeneity from crystallographic densities\, and generates high-accuracy NMR ensembles orders of magnitude faster than the state-of-the-art and often better fitting the experimental data than the publicly deposited structures to the Protein Data Bank. I believe that this approach will unlock building predictive models that fully embrace experimentally observed conformational diversity.​\n_\n​\n\n\n\nLes séminaires et soutenances sont ouverts à tous\, notez toutefois que l’accès au campus EPN nécessite un avis de rendez-vous. Merci de remplir ce formulaire  et de l’adresser\, plus de 48h à l’avance\, à ce contact.\nPensez à vous munir d’une pièce d’identité le jour de votre visite.
URL:https://sfp-alpes.fr/event/alexander-bronstein-institute-of-science-technology-autriche/
LOCATION:IBS – Salle des séminaires\, IBS 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IBS":MAILTO:ibs.seminaires@ibs.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260911T110000
DTEND;TZID=Europe/Paris:20260911T120000
DTSTAMP:20260903T154443Z
CREATED:20260903T154413Z
LAST-MODIFIED:20260903T154443Z
UID:10000239-1789124400-1789128000@sfp-alpes.fr
SUMMARY:William FAUGNO (LKB)
DESCRIPTION:Topology in the Many-Body Spectrum: A Spectral Localizer Approach to Quantum Scars\nRésumé : \nTopological phases\, both single-particle and many-body\, are often formulated through momentum-space invariants\, many of which rely on the presence of a spectral gap. However\, disorder and gapless spectra can make these conventional approaches difficult to apply. The spectral localizer provides an alternative real-space framework for defining and characterizing topology in such settings. By combining the Hamiltonian with position operators\, it constructs a pseudospectrum that can identify topologically protected states while simultaneously providing a measure of their spectral stability. The spectral localizer has been successfully applied to a variety of single-particle systems\, including disordered and gapless systems. In this seminar\, I will present recent work extending the spectral localizer to many-body systems. Our construction provides a general pseudospectral framework for identifying topologically protected states throughout the many-body spectrum. We have used this framework to identify candidates for quantum many-body scarring in both an interacting chiral bosonic chain and the PXP model\, demonstrating that the approach is not tied to a particular microscopic mechanism for scarring. The many-body spectral localizer thus provides new insight into the structure and stability of these anomalous ETH-violating states\, while offering a quantitative measure of their stability. Finally\, I will discuss the implications of this framework for quantum error-correcting codes constructed from quantum many-body scar subspaces. \nContact : jeanne.colbois@neel.cnrs.fr \nLe séminaire théorie est financé par la fédération de recherche Quantalps.
URL:https://sfp-alpes.fr/event/william-faugno-lkb/
LOCATION:LPMMC – salle Roger Maynard (G421)\, CNRS - LPMMC 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260911T123000
DTEND;TZID=Europe/Paris:20260911T131500
DTSTAMP:20260827T150826Z
CREATED:20260827T150807Z
LAST-MODIFIED:20260827T150826Z
UID:10000222-1789129800-1789132500@sfp-alpes.fr
SUMMARY:Sandra LAVOREL (Laboratoire d’Écologie Alpine\, Grenoble)
DESCRIPTION:S’allier avec la nature pour l’adaptation au changement climatique\nRésumé : \nLes écosystèmes en bon état et leur biodiversité contribuent de multiples façons à la qualité de notre vie. Outre leur rôle dans la séquestration du carbone\, ils soutiennent l’adaptation au changement climatique par leur résilience\, la régulation des risques naturels ou le soutien du tissu économique et culturel. Les solutions fondées sur la nature mobilisent ces capacités par la conservation\, la gestion durable et la restauration de la biodiversité. Dans cette présentation vous verrez comment elles peuvent être mises en œuvre dans nos territoires\, en concertation avec leurs acteurs. \nÀ propos de l’intervenant : \nSandra Lavorel est directrice de recherche au CNRS. Elle est une figure majeure de l’écologie scientifique. Elle travaille au Laboratoire d’Écologie Alpine à Grenoble. Pionnière de l’écologie fonctionnelle des plantes\, ses recherches portent sur les effets du changement climatique et des usages des sols sur la biodiversité\, et le fonctionnement des écosystèmes. Elle applique ces approches à la quantification des services écosystémiques et à l’adaptation au changement climatique. Avec ses travaux interdisciplinaires et transdisciplinaires\, elle figure parmi les leaders mondiaux de l’analyse des trajectoires d’adaptation fondée sur la nature. Très impliquée dans le dialogue science-politique\, elle a contribué aux évaluations internationales (IPBES\, GIEC) et nationales (Evaluation Française des Ecosystème et des Services Ecosystémiques). \n_ \nContact : contact@giant-grenoble.org \n 
URL:https://sfp-alpes.fr/event/sandra-lavorel-laboratoire-decologie-alpine-grenoble/
LOCATION:Amphi Minatec\, 3 parvis Louis Néel\, Grenoble\, 38054\, France
CATEGORIES:Séminaire
ORGANIZER;CN="GIANT":MAILTO:giant.campus@cea.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260914T110000
DTEND;TZID=Europe/Paris:20260914T120000
DTSTAMP:20260910T140135Z
CREATED:20260910T140135Z
LAST-MODIFIED:20260910T140135Z
UID:10000241-1789383600-1789387200@sfp-alpes.fr
SUMMARY:Daniel DUFFY (Cambridge\, UK)
DESCRIPTION:Mechanics and geometry of nematic shape-morphing sheets\n\nRésumé : \nThin ‘shape-programmed’ sheets morph into curved shapes when stimulated by heat\, light\, or chemical fuel. Biology is full of intricate examples (leaves\, petals\, etc)\, and soft synthetic materials such as liquid-crystal elastomers have begun to approach similar levels of richness\, opening doors to bio-inspired soft machines. Such machines can lift\, pump\, push\, pull\, . . . etc\, promising myriad applications including microfluidic components\, deployable structures\, switchable surfaces\, and robotic actuators. I’ll present work on nematic shape morphers\, in which the direction of anisotropic deformation is patterned\, while deformation magnitudes are spatially uniform. The focus will be on encoding Gauss curvature\, which imparts mechanical strength to the resultant structures\, as Gauss understood centuries ago. The patterned deformation direction must typically be chosen at the time of manufacture\, leading to a design limitation: the morphing sheet can only realise a single target shape. I will then show how to overcome this limitation\, by varying the deformation magnitude (e.g. via patterned illumination) in both space and time. This new paradigm allows a single physical sample to be morphed into arbitrarily many different shapes at will. Thus a designer can specify entire time-dependent motions of the sheet. This capability could greatly increase the versatility of soft robots\, e.g. when operating in confined environments or performing complex tasks. Furthermore\, it facilitates swimming\, which typically requires non-reciprocal motion. More generally\, it unlocks the full potential of shape-morphing sheets\, allowing them to progress from being merely functional to being truly multi-functional. \n_ \nContact : emmanuel.siefert@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/daniel-duffy-cambridge-uk/
LOCATION:LiPhy – Salle de conférence\, LiPhy 140 avenue de la Physique\, St Martin d'Hères\, 38402\, France
CATEGORIES:Séminaire
END:VEVENT
END:VCALENDAR