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TZID:Europe/Paris
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DTSTART:20250330T010000
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DTSTART:20251026T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260224T183000
DTEND;TZID=Europe/Paris:20260224T183000
DTSTAMP:20260617T174822
CREATED:20260222T085804Z
LAST-MODIFIED:20260222T090042Z
UID:10000072-1771957800-1771957800@sfp-alpes.fr
SUMMARY:Sophie Abby (TIMC\, Grenoble)
DESCRIPTION:Le premier souffle : comment les microbes ont oxygéné la Terre\nRésumé :  \nCette soirée explore la diversité du vivant à travers l’arbre phylogénétique\, en s’appuyant sur les travaux du projet Quinevol qui étudie les quinones\, molécules essentielles présentes dans tous les organismes vivants. Comment les organismes primitifs respiraient-ils avant l’apparition de l’oxygène ? Comment se sont-ils ensuite adaptés à ce qui était alors un véritable poison ? Un voyage scientifique des origines de la vie jusqu’aux frontières de la recherche actuelle. \n 
URL:https://sfp-alpes.fr/event/sophie-abby-timc-grenoble/
LOCATION:Museum de Grenoble\, 1 Rue Dolomieu\, Grenoble\, 38000\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260226T130000
DTEND;TZID=Europe/Paris:20260226T140000
DTSTAMP:20260617T174822
CREATED:20260130T162946Z
LAST-MODIFIED:20260213T084606Z
UID:10000050-1772110800-1772114400@sfp-alpes.fr
SUMMARY:Céline SCORNAVACCA (ISEM – Montpellier)
DESCRIPTION:A New Algorithm for Computing the Likelihood of a Phylogeny\nContact : lucie.lamothe@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/celine-scornavacca-isem-montpellier/
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:20260226T140000
DTEND;TZID=Europe/Paris:20260226T150000
DTSTAMP:20260617T174822
CREATED:20260130T101313Z
LAST-MODIFIED:20260130T101624Z
UID:10000044-1772114400-1772118000@sfp-alpes.fr
SUMMARY:Rolf LORTZ (CNRS-LNCMI\, Grenoble)
DESCRIPTION:High temperatures superconductivity with giant pressure effect in 3D networks of boron doped ultra-thin carbon nanotubes in the pores of ZSM-5 zeolite\nRésumé : \nWe report the fabrication of three‑dimensional\, interconnected networks of ultrathin carbon nanotubes (CNTs) embedded within the ~5 Å pores of zeolite ZSM‑5 crystals using a controlled chemical vapour deposition (CVD) process. Confinement within these sub‑nanometre channels yields CNTs with strongly one‑dimensional electronic characteristics\, including pronounced van Hove singularities in the density of states. By introducing boron dopants during growth\, we strategically tune the Fermi level toward a van Hove singularity\, as supported by ab initio electronic‑structure calculations. This electronic tuning\, combined with the intrinsic 3D connectivity of the CNT–zeolite framework\, enables a dimensional crossover from 1D electronic states to a phase‑coherent\, bulk superconducting state.\nTo establish the presence of superconductivity\, we employ five complementary experimental probes—electrical resistivity\, ac susceptibility\, dc magnetization\, specific heat\, and point‑contact spectroscopy. All measurements consistently indicate a superconducting transition at ambient pressure with a critical temperature Tc in the range of 220–250 K. Simultaneous resistivity and ac‑susceptibility measurements reveal a three‑order‑of‑magnitude drop in resistance accompanied by the onset of a robust Meissner effect with nearly perfect diamagnetic screening. Point‑contact spectroscopy further uncovers a multigap superconducting state\, with a dominant gap of approximately 30 meV\, in reasonable agreement with expectations from Bardeen–Cooper–Schrieffer (BCS) theory. The differential conductance spectra exhibit clear particle–hole symmetry and evolve smoothly between the tunnelling and Andreev reflection regimes as the contact transparency is varied—behaviour uniquely characteristic of superconducting quasiparticles. Specific‑heat measurements show a distinct anomaly at the transition\, reminiscent of signatures observed in high‑Tc cuprate superconductors.\nFinally\, we find that the application of very modest external pressure further enhances the superconducting transition temperature\, pushing Tc above ambient temperature and suggesting that the system remains far from its optimal tuning point. These results collectively point to a new pathway for achieving high‑temperature superconductivity in engineered low‑dimensional carbon‑based materials. \nContact : florence.levy-bertrand@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/rolf-lortz-cnrs-lncmi-grenoble/
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:20260226T140000
DTEND;TZID=Europe/Paris:20260226T150000
DTSTAMP:20260617T174822
CREATED:20260130T095731Z
LAST-MODIFIED:20260130T102010Z
UID:10000043-1772114400-1772118000@sfp-alpes.fr
SUMMARY:Paulo Henrique MACIEL BUZZETTI (Département de Chimie Moléculaire\, équipe I2BM (nouvel entrant))
DESCRIPTION:From Bio-analytics & Bio-energy : A Journey Through Functional Interfaces & Supramolecular Architectures\nContact : quentin.laurent@univ-grenoble-alpes.fr 
URL:https://sfp-alpes.fr/event/paulo-henrique-maciel-buzzetti-departement-de-chimie-moleculaire-equipe-i2bm-nouvel-entrant/
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:20260227T110000
DTEND;TZID=Europe/Paris:20260227T120000
DTSTAMP:20260617T174822
CREATED:20260129T163105Z
LAST-MODIFIED:20260130T142401Z
UID:10000041-1772190000-1772193600@sfp-alpes.fr
SUMMARY:Jean-Francois COLLET (Institut de Duve\, Bruxelles)
DESCRIPTION:How (and Why) do Gram-Negative Bacteria build an Outer Membrane\nRésumé :  \nGram-negative bacteria are defined by a complex cell envelope in which the outer membrane plays a central role in protection\, nutrient exchange\, and antibiotic resistance. This asymmetric lipid bilayer forms a robust permeability barrier\, yet its biogenesis presents a striking challenge : all outer membrane components are synthesized in the cytoplasm or at the inner membrane and must be transported and assembled across the periplasm without direct energy input. In this talk\, I will discuss how Gram-negative bacteria build their outer membrane and why this process is essential for cellular physiology. I will introduce the major pathways responsible for outer membrane assembly and highlight how their activities need to be coordinated to maintain envelope integrity. I will also present recent work showing that the outer membrane is not merely a passive barrier\, but a mechanically active structure that enables the buildup of periplasmic pressure\, a property critical for envelope stability and bacterial survival. Together\, these findings underscore the outer membrane as a dynamic\, multifunctional organelle and a promising target for future antibacterial strategies. \nContact : ibs.seminaires@ibs.fr
URL:https://sfp-alpes.fr/event/jean-francois-collet-institut-de-duve-bruxelles/
LOCATION:IBS – Salle des séminaires\, IBS 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IBS":MAILTO:ibs.seminaires@ibs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260302T110000
DTEND;TZID=Europe/Paris:20260302T120000
DTSTAMP:20260617T174822
CREATED:20260227T102022Z
LAST-MODIFIED:20260227T102040Z
UID:10000083-1772449200-1772452800@sfp-alpes.fr
SUMMARY:Matteo MILANI (ESPCI Paris)
DESCRIPTION:Rheofluidics: single-drop oscillatory rheology with microfluidics\nRésumé : \nThe measurement of frequency-dependent viscoelastic moduli is of paramount importance in many fields\, from material science to biology\, and is typically accomplished in bulk materials using commercial rheometers. The trend towards miniaturization in the biotechnology\, manufacturing and chemical processing industries has motivated the extension of viscoelastic measurements to microscopic objects with well-defined shape and size such as droplets\, vesicles\, microcapsules\, or even single cells. For instance\, local mechanical probes such as AFM nanoindentation can be used to probe single-cell stiffness\, and micropipette aspiration probes the interfacial properties of droplets and vesicles. Despite their versatility\, these techniques are characterized by complex deformation geometries and a relatively low throughput\, which makes them unfit to sample highly heterogeneous populations such as those typical of biological samples. To this end\, novel microfluidic approaches have been recently developed to measure the stiffness of cells and droplets flowing through narrow channels. These approaches are well-suited for applications requiring a high throughput\, but they lack the fine control of stress and strain required by quantitative mechanical measurements. Here\, we present a novel technique called Rheofluidics\, which combines the high throughput of microfluidics with the versatility of traditional rheological probes. Like a stress-controlled rheometer\, Rheofluidics measures the time-dependent deformation of droplets subject to a well-defined hydrodynamic stress\, whose time evolution is controlled by the shape of the microfluidic channel in which the droplets are flowing. To validate this approach and to demonstrate the power of this technique\, we study the linear and nonlinear rheology of oil droplets\, hydrogel beads and lipid vesicles\, extracting their viscoelastic properties with a throughput more than 1000 times higher than that of standard rheology. \nContact : gwennou.coupier@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/matteo-milani-espci-paris/
LOCATION:LiPhy\, Salle de Conférence\, 140 rue de la Physique\, St Martin d'Hères\, 38400
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260302T110000
DTEND;TZID=Europe/Paris:20260302T120000
DTSTAMP:20260617T174822
CREATED:20260227T094612Z
LAST-MODIFIED:20260227T094814Z
UID:10000077-1772449200-1772452800@sfp-alpes.fr
SUMMARY:Moritz SENGER (Université d’Uppsala\, Département de chimie pour les sciences de la vie\, Suède)
DESCRIPTION:From Catalysis to Sensing : Proton Transfer in [FeFe]-hydrogenases\nRésumé : \nEnzymes are natures catalysts enabling challenging reactions at ambient conditions and at low overpotentials. In particular\, [FeFe]-hydrogenases which catalyse bidirectional H2 turnover (2e- + 2H+ <-> H2) at high turnover numbers raise interest for their application in a green hydrogen economy. In [FeFe]-hydrogenases catalysis takes place at a unique diiron cofactor that is equipped with carbon monoxide (CO) and cyanide (CN) ligands. They serve as intrinsic infrared active probes sensitive to redox changes located directly at the centre of the catalytic reaction. This in isolation inactive di-iron cofactor becomes efficient H2 catalyst when incorporated into the [FeFe]-hydrogenase protein scaffold. More recently H2 sensing [FeFe]-hydrogenases have been characterised using the identical cofactor but for H2 sensing. The fundamental design principles of the protein scaffolds to selectively tune cofactor function either to efficient H2 catalyst or to H2 sensor remain unknown.Here we use organic dyes to artificially activate catalytic [1-2] and sensory [3-5] [FeFe]-hydrogenases photochemically and investigate them via in situ ATR-FTIR spectroscopy. Following changes of the cofactor CO and CN ligands\, single carboxylic acid residues and collective amide I modes\, we show that protein scaffold differences are not limited to the cofactor second coordination sphere but extend through the whole protein via proton transfer pathways\, secondary structure changes and most likely dimerization events. More general\, our results give a first idea how protein scaffolds can tune cofactor functions. \nReferences :[1] M. Senger\, V. Eichmann\, K. Laun\, J. Duan\, F. Wittkamp\, G. Knor\, U. P. Apfel\, T. Happe\, M. Winkler\, J. Heberle and S. T. Stripp*J Am Chem Soc\, 2019\, 141\, 17394-17403.[2] M. Lorenzi\, M. T. Gamache\, H. J. Redman\, H. Land\, M. Senger* and G. Berggren*ACS Sustain Chem Eng\, 2022\, 10\, 10760-10767.[3] I. Voloshyn\, C. Schumann\, P. R. Cabotaje\, A. Zamader\, H. Land and M. Senger*Chem Commun (Camb)\, 2024\, 60\, 10914-10917[4] M. Senger*\, C. Schumann\, P. R. Cabotaje\, A. Zamader\, P. Huang\, H. Land and G. Berggren*Phys Chem Chem Phys\, 2025\, 27 (18)\, 9864-9875 [5] Cabotaje\, P. R. ; Sekretareva\, A. ; Senger\, M. ; Huang\, P. ; Walter\, K. ; Redman\, H. J. ; Croy\, N. ; Stripp\, S. T. ; Land\, H. ; Berggren\, G.J Am Chem Soc 2025\, 147 (5)\, 4654-4666. \nContact : ibs.seminaires@ibs.fr
URL:https://sfp-alpes.fr/event/moritz-senger-universite-duppsala-departement-de-chimie-pour-les-sciences-de-la-vie-suede/
LOCATION:IBS – Salle des séminaires\, IBS 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IBS":MAILTO:ibs.seminaires@ibs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260302T140000
DTEND;TZID=Europe/Paris:20260302T150000
DTSTAMP:20260617T174822
CREATED:20260206T095950Z
LAST-MODIFIED:20260206T095958Z
UID:10000056-1772460000-1772463600@sfp-alpes.fr
SUMMARY:Ran TAO  (Institut Néel)
DESCRIPTION:Magnetic excitations in LuFe2Ge2\nRésumé : \nThe iron-based superconductor YFe2Ge2 (Tc ~ 1.8 K)[1] has attracted interest due to strong electronic correlations[2] and shows enhanced magnetic fluctuations in neutron scattering[3]. Its isoelectronic and isostructural sister compound LuFe2Ge2 orders antiferromagnetically below TN ~ 6.8 K\, and in clean crystals shows a resistive superconducting transition below 1 K. We present recent inelastic neutron scattering experiments on LuFe2Ge2 in the ordered and paramagnetic phases. The excitations are modelled with linear spin wave theory\, and we note some similarities to previous results in paramagnetic YFe2Ge2. \n[1] J. Chen et al.\, Phys. Rev. Lett. 125\, 237002 (2020).\n[2] J. Baglo et al. Phys. Rev. Lett. 129\, 046402 (2022). B. Xu et al.\, Proc. Natl. Acad. Sci. U. S. A. 121\, e2401430121 (2024).\n[3] H. Wo et al.\, Phys. Rev. Lett. 122\, 217003 (2019). \n_ \nContact : andrew.fefferman@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/ran-tao-institut-neel/
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:20260303T140000
DTEND;TZID=Europe/Paris:20260303T140000
DTSTAMP:20260617T174822
CREATED:20260227T153207Z
LAST-MODIFIED:20260227T153207Z
UID:10000089-1772546400-1772546400@sfp-alpes.fr
SUMMARY:Marco MACCARINI (chercheur UGA)
DESCRIPTION:Exploring the Nanostructure of Biomimetic Membranes\nRésumé : \nModel lipid membranes are simplified yet powerful systems that mimic key features of biological plasma membranes—the essential envelopes that define and protect living cells. Their controlled simplicity makes them ideal for precise experimental techniques\, enabling us to explore their interactions with novel nanoengineered materials. \nWhen combined with biological components like proteins\, these membranes not only deepen our understanding of fundamental biological processes but also serve as building blocks for advanced nanoengineered materials with tailored technological applications. \nIn this seminar\, I will present examples from my research\, where laboratory techniques\, large-scale facility analyses\, and computational methods converge to provide in-depth characterization and mechanistic insights into membrane behavior. These findings hold significant potential for advancements in health\, biotechnology\, and fundamental biology. \nShort Bio/CV\nAs  a CNRS Chargé de Recherche\, I’ve recently joined the LMGP to continue my research journey in this scientific new environment. My academic path has taken me across borders—starting with a Physics degree in Italy\, followed by a PhD in Polymer Physics in England\, and postdoctoral experiences in Germany and Canada. Along the way\, I’ve had the privilege of working at world-class facilities like the Institut Laue Langevin\, where I deepened my expertise in large-scale scientific infrastructure. I now continue this work at LMGP\, where my research focuses on the intersection of physics\, materials science\, and biomimetic systems. \nContact : deborah.verger@grenoble-inp.fr
URL:https://sfp-alpes.fr/event/marco-maccarini-chercheur-uga/
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:20260303T183000
DTEND;TZID=Europe/Paris:20260303T203000
DTSTAMP:20260617T174822
CREATED:20260212T165924Z
LAST-MODIFIED:20260212T165934Z
UID:10000061-1772562600-1772569800@sfp-alpes.fr
SUMMARY:Carlyne BERTHOT (docteure en sociologie)\, Michael DECRESSAC (neuroscientifique spécialiste du vieillissement cérébral) & Gaëtan GAVAZZI (spécialiste en gériatrie)
DESCRIPTION:Vieillissement : pas de limites ? \nRésumé : \nDepuis 1950\, l’espérance de vie à la naissance en France a progressé de plus de 16 années\, en raison en particulier de la diminution de la mortalité infantile. Parallèlement le nombre de centenaires a lui aussi considérablement augmenté dans notre pays mais qu’en est-il de la longévité de l’espèce humaine? En effet\, si l’on mettait de côté tous les paramètres environnementaux\, les maladies chroniques ou autres accidents de la vie qui accélèrent le vieillissement\, combien de temps pourrait-on vivre exactement ? Alors que de nombreux scientifiques pensent que la longévité humaine serait limitée à 120 ans\, d’autres suggèrent qu’il n’y a pas de limites formelles à la longévité\, en particulier grâce au développement des connaissances et des technologies.  \nMais jusqu’où pourra-t-on aller ? L’immortalité est-elle possible ? Notre société est-elle à même d’affronter les conséquences sociétales et démographiques sans parler des coûts d’un allongement sans fin de notre longévité ? \nPlus d’informations : www.echosciences-grenoble.fr/cafesciences \nContact : cafe@cafesciencegrenoble.fr \n 
URL:https://sfp-alpes.fr/event/carlyne-berthot-docteure-en-sociologie-michael-decressac-neuroscientifique-specialiste-du-vieillissement-cerebral-gaetan-gavazzi-specialiste-en-geriatrie/
LOCATION:Café des Arts\, 36\, rue St Laurent\, Grenoble\, 38000\, France
CATEGORIES:Conférence
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260305T113000
DTEND;TZID=Europe/Paris:20260305T123000
DTSTAMP:20260617T174822
CREATED:20260227T134443Z
LAST-MODIFIED:20260227T134815Z
UID:10000084-1772710200-1772713800@sfp-alpes.fr
SUMMARY:Viviana RICON MONTES & Andreas OFFENHÄUSSER (Forschungszentrum Jülich\, Allemagne)
DESCRIPTION:Devices that interact with the brain: from nanostructured to flexible electrodes\nRésumé : \nNeural electrodes are the core components of neuroelectronic devices\, enabling the recording and simulation of neural activity. Our research focuses on two primary areas : (1) the design and\ncharacterization of the neuron-electrode interface\, and (2) the development of flexible neural interfaces for both in vivo and in vitro applications. Microelectrode arrays (MEAs) are commonly used to bridge the interface between neurons and electronic systems. However\, current MEAs face limita7ons in signal fidelity\, precision of neural modulation\, and long-term biocompatibility. To address these challenges\, we are developing nanomaterial-based MEAs that offer enhanced physical and chemical properties\, leading to improved cell-electrode coupling. Specifically\, we have engineered a hybrid structure combining vertical nanostraws with nanocavities\, enabling stable\, non-invasive\, and long-term recording at sub-threshold resolution. \nImplantable neural prosthetic devices provide direct access to local neural circuits and are critical components of brain-machine interfaces. While current clinical-grade devices—typically based on silicon or noble metals—have driven significant advances\, they oPen fail to sustain reliable neural communication over extended periods. Our goal is to create next-generation neurotechnologies that integrate seamlessly with biological tissue\, supporting multimodal neural interrogation through electrical\, optical\, or chemical means. We are actively exploring novel device architectures\, materials\, and implantation strategies\, alongside rigorous performance evaluation\, with the ultimate aim of enabling both acute and chronic in vivo applications. Our approach combines thin-film technology and surface micromachining processes with additive manufacturing techniques\, including two-photon lithography. These are integrated with self-\naligned\, template-assisted electrodeposition processes\, kirigami-inspired designs with matched-die forming\, novel bonding methods\, and the modular stacking of two-dimensional neural probes with key-lock systems. These technologies support versatile applications\, ranging from investigating seizure-like activity in in vitro epilepsy models to advancing visual prosthesis that enable bidirectional communication along the visual pathway. \nContact : clement.hebert@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/viviana-ricon-montes-andreas-offenhausser-forschungszentrum-julich-allemagne/
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:20260305T140000
DTEND;TZID=Europe/Paris:20260305T150000
DTSTAMP:20260617T174822
CREATED:20260213T084049Z
LAST-MODIFIED:20260213T084159Z
UID:10000062-1772719200-1772722800@sfp-alpes.fr
SUMMARY:Dalila BOUNOUA (LLB)
DESCRIPTION:Polarized Neutrons Reveal Altermagnetism in MnF2\nRésumé : \nAltermagnets constitute a recently identified class of collinear\, magnetically compensated materials in which oppositely oriented magnetic sublattices cannot be mapped onto each other  another by a primitive lattice translation or inversion operation. Unlike conventional antiferromagnets\, altermagnets break time-reversal symmetry. These distinctive symmetry properties give rise to spin-split electronic bands and chirality-split magnon branches\, both exhibiting characteristic anisotropic patterns in momentum space\, even in the absence of relativistic spin-orbit coupling [1].\nExperimental evidence for spin-split electronic bands has been reported in materials such as MnTe and CrSb using angle-resolved photoemission spectroscopy (ARPES) [2\,3]\, while resonant inelastic X-ray scattering (RIXS) has revealed chiral magnon excitations in CrSb [4]. Polarized neutron scattering\, however\, provides a unique probe of altermagnetism\, as it enables a direct characterization of spin-wave excitations and allows both split magnons [5-7] and their associated chirality [8-10] to be measured simultaneously.\nIn this work\, we investigated the chirality-split magnon spectrum of MnF₂ [9] using polarized inelastic neutron scattering (INS). Our measurements reveal\, for the first time in MnF₂\, a small but clearly resolvable splitting of the magnon branches\, primarily driven by long-range dipolar interactions. Polarization analysis on a magnetically domain-biased sample further uncovers a finite chiral contribution to the neutron scattering cross section\, which reverses sign between the two split magnon modes. These observations provide direct spectroscopic evidence of altermagnetism in MnF₂. \n[1] G. L. Smejkal et al.\, Phys. Rev. X 12\, 040501 (2022).\n[2] J. Krempasky\, et al.\, Nature 626\, 517–522 (2024).\n[3] S. Reimers et al.\, Nat. Comm 15\, 2116 (2024)\, G. Yang et al. Nat Commun 16\, 1442 (2025).\n[4] N. Biniskos et al.\, Nat Commun 16\, 9311 (2025).\n[5] Z. Liu Phys. Rev. Lett. 133\, 156702 (2024).\n[6] Q. Sun et al.\, Phys. Rev. Lett. 135\, 18 (2025).\n[7] A. K. Singh et al.\, arXiv:2511.16086.\n[8] P. A. McClarty et al.\, Phys. Rev. B 111\, L060405 (2025).\n[9] Q. Faure at al.\, arXiv:2509.07087 (under review).\n[10]  J. Sears et al.\, arXiv:2601.04303v1 \n \nContact : elsa.lhotel@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/dalila-bounoua-llb/
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:20260306T110000
DTEND;TZID=Europe/Paris:20260306T120000
DTSTAMP:20260617T174822
CREATED:20260227T090909Z
LAST-MODIFIED:20260227T091022Z
UID:10000076-1772794800-1772798400@sfp-alpes.fr
SUMMARY:Kilian FRABOULET (Max Planck Institute Stuttgart)
DESCRIPTION:Competing orders in many-electron systems: a renormalization group perspective\nRésumé :  \nThe renormalization group is an established approach to study quantum many-body systems\, and this applies especially to one of its modern implementations known as the functional renormalization group (fRG). In particular\, the fRG constitutes a flexible and unbiased tool for the study of competing orders. In this talk\, I will outline recent progress in this direction for correlated electron systems. To this end\, I will first discuss the competition between antiferromagnetism\, charge density waves and superconductivity in the 2D Hubbard model\, thus making a connection with high-temperature superconductors. The special role of bosonization methods will be emphasized along the way. I will also show how the fRG can be combined with dynamical mean-field theory to treat strongly interacting regimes\, with a focus on d-wave superconductivity. As a next step\, I will increase the complexity of the model by including non-local interactions and discuss unconventional superconductivity in an extended Hubbard model with a connection to moiré materials. Special consideration will also be given to the treatment of retarded interactions with electron-phonon couplings. Finally\, I will highlight recent fRG studies of quantum criticality in Dirac materials\, with a connection to graphene. \nContact : serge.florens@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/kilian-fraboulet-max-planck-institute-stuttgart/
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:20260306T140000
DTEND;TZID=Europe/Paris:20260306T150000
DTSTAMP:20260617T174822
CREATED:20260305T145615Z
LAST-MODIFIED:20260305T145620Z
UID:10000093-1772805600-1772809200@sfp-alpes.fr
SUMMARY:Carlo PIFFERI (Centre de Biophysique Moléculaire\, Orléans)
DESCRIPTION:Exploiting disulfide-rich peptides as protein epitope mimics : development of a generalizable conjugation approach for immunogen preparation\nRésumé : \nGeneration of specific antibodies against peptides by immunization requires their covalent conjugation to protein carriers to override their inherently weak immunogenicity. The vast majority of bioconjugation approaches to achieve peptide-protein constructs rely on thiol-maleimide chemistry1 and capitalize on a wide array of commercial maleimide-functionalized protein carriers. Disulfide-rich peptides2 (DRPs) possess a rigid\, constrained structure that makes them ideal for designing synthetic mimics of protein regions/domains. For bioconjugation purposes\, the introduction of a single spare thiol moiety into a linear peptide antigen is straightforward\, while DRPs’ disulfide bonds are prone to intramolecular thiophilic attack by the reactive thiolate. This unintended reactivity competes with the desired Michael addition to the maleimide moiety\, ultimately disrupting the native disulfide bridging framework. As a result\, DRP’s tertiary structure will be altered\, affording an immunogen that is a poor mimic of the native target. Although a few studies have explored the late-stage introduction of thiol-containing cross-linkers onto DRP antigens for their conjugation onto protein carriers\,3\,4 the stability of DRP’s disulfide pattern in the presence of an extra thiol has never been examined. To address this\, we systematically evaluated the influence of different spacers in “DRP-spacer-thiol” constructs\, under thiol-maleimide reaction conditions.5 Our results highlight how both linker length and flexibility are key to maintain DRP disulfides unaltered\, providing a general approach to achieve DRP bioconjugation by thiol-maleimide chemistry. We have applied our approach to a small DRP predicted to closely mimic a surface-accessible epitope of the full LINGO-1 protein\, and obtained a very specific antibody response upon immunization: the resulting polyclonal IgG was able to selectively bind the full-length protein in a cellular context\, with stringent selectivity across its four homologs. \nReferences : \n1. M. Góngora-Benítez\, J. Tulla-Puche & F. Albericio\, Chem. Rev. 2014\, 114\, 901–926.\n2. K. Renault\, J. W. Fredy\, P.-Y. Renard & C. Sabot\, Bioconjug. Chem. 2018\, 29\, 2497–2513.\n3. H. Katayama & M. Mita\, Bioorganic Med. Chem. 2016\, 24\, 3596–3602.\n4. H. Katayama\, R. Mizuno & M. Mita\, Biosci. Biotechnol. Biochem. 2019\, 83\, 1791–1799.\n5. L. Azzoug et al.\, ChemRxiv 2025\, DOI:10.26434/chemrxiv-2025-krjcm \n_ \nContact : david.goyard@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/carlo-pifferi-centre-de-biophysique-moleculaire-orleans/
LOCATION:DCM – Salle C209\, DCM - Bât Chimie Recherche 301 rue de la Chimie\, St Martin d'Hères\, 38400\, France
CATEGORIES:Séminaire
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