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DTSTART;TZID=Europe/Paris:20261012T100000
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DTSTAMP:20260626T084843Z
CREATED:20260625T151925Z
LAST-MODIFIED:20260626T084843Z
UID:10000209-1791799200-1792069200@sfp-alpes.fr
SUMMARY:OLIMPICS 2026 : Physics and living systems
DESCRIPTION:We are pleased to announce the 2026 conference « Physics and living systems » of the OLIMPICS federation (CNRS\, UGA\, G-INP\, CEA). It will take place in the Bauges Massif (Lescheraines)\, from Monday\, October 12 at 10:00 am to Thursday\, October 15 at 1:00 pm. \nRegistrations and abstract submissions will be open from now until July 31th. \nThis event is intended to give early-career scientists the opportunity to present their work and build their network. Therefore\, we strongly encourage the participation of PhD students and PostDocs. Scientific talks will be complemented by off-topic talks\, free time for discussions and poster sessions. \nA shuttle service will be operated from Grenoble and Chambéry train stations to/from the conference venue at the beginning and end of the conference. \n  \nWe will have the pleasure of welcoming four guest speakers on each of the four major themes that make up our community : \n– Stéphanie Descroix (DR CNRS\, Institut Curie\, Paris) – Theme : Investigating the living world \n– Yanxia Hou-Broutin (DR CNRS\, SyMMES\, Grenoble) – Theme : Bio-inspired physics and engineering \n– Guillaume Salbreux (Prof. Université de Genève\, Department of Genetics and Evolution) Theme : Dynamics of living systems \n– Julien Gautrot (Prof. Univ. London\, Centre for Molecular Biochemical Engineering) Theme: Physical interactions \n  \nMore information on the conference venue\, registration\, access map\, registration fees\, and other practical information is available on our website : https://olimpics2026.sciencesconf.org \n_ \nContact : olimpics2026@sciencesconf.org
URL:https://sfp-alpes.fr/event/olimpics-2026-physics-and-living-systems/
LOCATION:L’Eau Vive – Géopark des Bauges\, Base de Loisirs de Lescheraines\, Lescheraines\, 73340\, France
CATEGORIES:Conférence,Evènements
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20261013T140000
DTEND;TZID=Europe/Paris:20261013T150000
DTSTAMP:20260918T144108Z
CREATED:20260918T143923Z
LAST-MODIFIED:20260918T144108Z
UID:10000265-1791900000-1791903600@sfp-alpes.fr
SUMMARY:Chung-Hou CHUNG (1 Department of Electrophysics\, National Yang Ming Chiao Tung University\, Hsinchu\, Taiwan -  2 Physics Division\, National center for Theoretical Sciences\, Taipei\,Taiwan)
DESCRIPTION:A theory for quantum-critical Planckian strange metal phase in high-Tc cuprate superconductors\nRésumé : \nThe strange metallic state showing incoherent charge transport with universal linear-in-temperature scattering rate: 1/τ = αP kB T / ħ with αP ~ 1 and logarithmic-in-temperature singular specific heat coefficient\, so-called “Planckian metal”\, has been observed in various high-Tc cuprate superconductors over a finite range in doping near optimal doping [1]. Understanding this state is believed to be the key to revealing the mechanism for high-Tc superconductivity. Here\, we propose a generic microscopic mechanism for this state based on quantum-critical local bosonic charge Kondo fluctuations coupled to both spinon and a heavy conduction-electron Fermi surfaces within the heavy-fermion formulated slave-boson t-J model [2]. Our theory is motivated by the striking similarity in strange metal phenomenology between cuprates and heavy-fermion Kondo lattice systems [3]. By a controlled perturbative renormalization group analysis of our effective heavy-fermion model\, we examine the competition between the pseudogap phase\, characterized by Anderson’s Resonating-Valence-Bond spin-liquid made of fermionic spin-singlet spinons\, and the Fermi-liquid state modeled by coherent electron hopping (charge Kondo hybridization). We find an extended quantum-critical metallic phase with a universal Planckian ħω/kBT scaling in scattering rate near a localized-delocalized (pseudogap-to-Fermi liquid) charge-Kondo breakdown transition of the model. The d-wave superconducting ground state emerges near the transition. Unprecedented qualitative and quantitative agreements are reached between our theoretical predictions and various experiments\, including ħω/kBT scaling in optical conductivity [4]\, universal doping-insensitive field-to-temperature (B/T-) scaling in magnetoresistance [5]\, singular specific heat coefficient [6]\, marginal Fermi-liquid spectral function observed in ARPES [7]\, and Fermi surface reconstruction observed in Hall coefficients in various overdoped cuprates [5\,8]. We further applied this framework to obtain a universal quantum-critical B/T-scaling in magneto-transport and unify the B-linear and T-linear Planckian scattering rate observed in LSCO over an extended doping range\, pointing toward a unified quantum–critical origin of Planckian transport in cuprates [9]. This universal Planckian metal phase can be realized within a solvable large-N multi-channel Kondo lattice model generalized from this heavy-fermion formulated tJ model [10]. Our mechanism offers a microscopic understanding of the quantum-critical Planckian metal phase observed in cuprates and its link to the pseudogap\, d-wave superconducting\, and Fermi liquid phases. It offers a promising route for understanding how d-wave superconductivity emerges from such a strange metal phase in cuprates–one of the long-standing open problems in condensed matter physics since 1990s. \nReferences  \n\nLegros et al.\, Nat. Phys. 15\, 142 (2019).\nA mechanism for quantum-critical Planckian metal phase in high-temperature cuprate superconductors\, YY Chang\, K Van Nguyen\, K Remund\, C.H. Chung*\, Reports on Progress in Physics\, 88\, 048001 (2025).\nThe scaled-invariant Planckian metal and quantum criticality in Ce1-xNdxCoIn5\, Yung-Yeh Chang\, Hechang Lei\, Cedomir Petrovic*\, Chung-Hou Chung*\, Nature Communications 14 (581) (2023); A mechanism for the strange metal phase in rare-earth intermetallic compounds”\, Jiangfan Wang\, Yung-Yeh Chang and Chung-Hou Chung*\, Proceedings of the National Academy of Sciences (PNAS)\, Volume 119(10) e2116980119 March 1\, 2022; Strange superconductivity near an antiferromagnetic heavy fermion quantum critical point\, Y. Y. Chang\, F. Hsu\, S. Kirchner\, C. Y. Mou\, T. K. Lee\, C. H. Chung*\, Phys. Rev. B 99\, 094513 (2019); Mechanism of a strange metal state near a heavy-fermion quantum critical point\, Yung-Yeh Chang\, Silke Paschen\, Chung-Hou Chung*\, Phys. Rev. B 97\, 035156 (2018).\nB. Michon et al.\, Nature Communications 14\, 3033 (2023).\nJ. Ayres et al.\, Nature 595\, 661 (2021).\nB. Michon et al.\, Nature 567\, 218 (2019).\nS.D. Chen et al.\, Science\, 366\, 1099 (2019).\nC. Proust et al.\, Annual Review of Condensed Matter Physics 10\, 409 (2019).\nUniversality of T –linear and B–linear Planckian scattering rate in high–Tc cuprate superconductors\, K. Remund\, K. V. Nguyen\, P.-H. Chou\, P. Giraldo-Gallo\, J. A. Galvis\, G. S. Boebinger\, and C.-H. Chung*\, arXiv:2602.10627.\nTheory of universal Planckian metal phase in t-J model: application for high-temperature cuprate superconductors\, YY Chang\, K Van Nguyen\, K Remund\, CH Chung*\, arXiv:2506.15552\n\n_ \nContact : david.leboeuf@lncmi.cnrs.fr
URL:https://sfp-alpes.fr/event/chung-hou-chung-1-department-of-electrophysics-national-yang-ming-chiao-tung-university-hsinchu-taiwan-2-physics-division-national-center-for-theoretical-sciences-taipeitaiwan/
LOCATION:CNRS – Salle René Pauthenet (J229)\, CNRS – LNCMI\, 25 avenue des Martyrs\, Grenoble\, 38000\, France
CATEGORIES:Séminaire
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20261013T140000
DTEND;TZID=Europe/Paris:20261013T150000
DTSTAMP:20261002T092401Z
CREATED:20261002T092401Z
LAST-MODIFIED:20261002T092401Z
UID:10000284-1791900000-1791903600@sfp-alpes.fr
SUMMARY:Maria del Mar RODRIGUEZ ROBLES
DESCRIPTION:Transparent electrodes based on silver nanowire networks protected by nitrides\nRésumé : \nSilver nanowire (AgNW) networks are promising alternatives to indium tin oxide (ITO) for transparent electrodes\, combining excellent optoelectronic performance\, mechanical flexibility\, and compatibility with scalable fabrication processes1. However\, their practical implementation is hindered by poor adhesion to substrates and degradation under thermal\, electrical\, mechanical\, and environmental stresses. These limitations are related to the high surface-to-volume ratio of AgNWs\, which promotes chemical reactivity\, surface diffusion\, and morphological instability2. \nThis thesis explores transition metal nitrides as protective coatings for AgNW networks3\, with the aim of improving their adhesion and long-term stability while preserving their optical and electrical performance. Nitrides such as TiN and AlN are particularly attractive because of their high hardness\, chemical inertness\, and thermal and mechanical stability. Despite these properties\, their use for protecting metallic nanowire networks remains largely unexplored. \nDifferent deposition strategies\, including Physical Vapor Deposition (PVD)\, Plasma-Enhanced Atomic Layer Deposition (PE-ALD)\, and Area-Selective Deposition using PE-ALD (ASD-PEALD)\, are investigated to develop controlled nitride coatings on AgNW networks. The thesis examines how the coating characteristics influence the structural\, optical\, and electrical properties of the electrodes\, as well as their stability under electrical\, thermal\, mechanical\, and environmental stresses. \nOverall\, this work aims to establish the potential of nitride-based protective strategies for overcoming the stability and adhesion limitations of AgNW transparent electrodes. The results provide new insights into the relationship between protective coating design\, nanowire stability\, and electrode performance\, contributing to the development of more durable and reliable transparent electrodes. \n1          S. Maurya\, L. Labeyrie\, K. Zimny\, M. D. M. Rodriguez-Robles\, B. Zheng\, S. Schumacher\, D. Muñoz-Rojas\, D. Bellet and M. Tréguer-Delapierre\, Advances in Physics: X\, 2025\, 10\, 2573818. \n2          L. Bardet\, D. T. Papanastasiou\, C. Crivello\, M. Akbari\, J. Resende\, A. Sekkat\, C. Sanchez-Velasquez\, L. Rapenne\, C. Jiménez\, D. Muñoz-Rojas\, A. Denneulin and D. Bellet\, Nanomaterials\, 2021\, 11\, 2785. \n3          D. T. Papanastasiou\, A. Mantoux\, A. Crisci\, H. Ribeiro\, A. Sekkat\, H. Roussel\, M. Weber\, L. Rapenne\, C. Jiménez\, M. Fivel\, D. Bellet\, E. Blanquet and D. Muñoz-Rojas\, ACS Appl. Nano Mater.\, 2024\, 7\, 12312–12322. \nShort Bio/CV \nI am a third-year PhD student at the LMGP and SIMaP labs with a background in nanoscience. As part of the ANR LES MENINES project\, my research focuses on the development of protective coatings for metallic nanowires for transparent electrodes applications via physical vapor and atomic layer deposition techniques\, with a special interest in nitrides and oxide coatings.  \n_ \nContact : deborah.verger@grenoble-inp.fr
URL:https://sfp-alpes.fr/event/maria-del-mar-rodriguez-robles/
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20261013T140000
DTEND;TZID=Europe/Paris:20261013T150000
DTSTAMP:20261009T091812Z
CREATED:20261009T091812Z
LAST-MODIFIED:20261009T091812Z
UID:10000297-1791900000-1791903600@sfp-alpes.fr
SUMMARY:Landry BRETHEAU (PMC\, Ecole Polytechnique\, CNRS\, IPP\, Palaiseau\, France)
DESCRIPTION:Nonlocal Josephson effect in an Andreev molecule\nRésumé : \nHybrid Josephson junctions – in which quantum conductors are used as weak links – offer a rich playground for novel quantum phenomena. They host localized fermionic states knowns as the Andreev bound states (ABS)\, which mediate the Josephson effect and carry the resulting supercurrent. When two such junctions are placed in close vicinity\, the ABS wavefunctions hybridize\, forming an Andreev molecule. In this regime\, the Josephson effect becomes nonlocal: the supercurrent flowing through one junction depends directly on the superconducting phase applied across the other. In this seminar\, I will present our recent experimental realization 1 of an Andreev molecule built on ultraclean carbon nanotubes\, which constitute elementary one-dimensional weak links. Using this platform\, we observed a pronounced nonlocal Josephson response and demonstrated that it stems from the formation of delocalized Andreev molecular states extending across both junctions. Furthermore\, we show that ground-state parity transitions induce characteristic π-phase shifts in the nonlocal response. Our findings demonstrate that the nonlocal Josephson effect offers a direct access into both the spatial structure and the global fermion parity of delocalized superconducting states. \n_ \nContact : equipe-seminaires-nano@listes.grenoble.cnrs.fr
URL:https://sfp-alpes.fr/event/landry-bretheau-pmc-ecole-polytechnique-cnrs-ipp-palaiseau-france/
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:20261013T140000
DTEND;TZID=Europe/Paris:20261013T160000
DTSTAMP:20260925T153332Z
CREATED:20260925T153332Z
LAST-MODIFIED:20260925T153332Z
UID:10000270-1791900000-1791907200@sfp-alpes.fr
SUMMARY:Soutenance de Thèse par Maria VAL PEVIDA (CEA-Irig/IBS)
DESCRIPTION:Structural study of NADPH oxidase complex NOX1 by cryo-electron microscopy\nRésumé : \nMembrane proteins (MPs) constitute a major class of pharmaceutical targets due to their central roles in essential physiological processes. Among them\, NADPH oxidases (NOX) comprise a family of transmembrane enzymes involved in numerous crucial cellular functions — including host defence\, hormone synthesis\, vascular tone regulation\, and equilibrium — through the regulated production of reactive oxygen species (ROS). NOX1\, one of the human NOX isoforms\, is predominantly expressed in the intestinal epithelium\, where it forms a heterodimeric complex with p22phox in the membrane. Dysregulation of NOX1 activity\, often arising from genetic mutations\, has been associated with early-onset colorectal cancer and inflammatory bowel disease (IBD). Elucidating the three-dimensional structures of MPs and their mechanistic properties is essential to accelerate structure-based drug design strategies. Cryo-electron microscopy (cryo-EM) has become a powerful technique for resolving MPs structures at atomic resolutions. However\, structural determination of small MPs (<100 kDa) remains challenging due to their low expression levels\, low signal-to-noise ratios\, dependence on detergent solubilisation\, and intrinsic conformational flexibility\, all which complicating particle alignment and high-resolution structure reconstruction. To overcome these limitations\, antigen-binding fragments (Fabs) are frequently employed as fiducials to increase particle size and stabilise specific conformations by binding to defined epitopes. \nIn this thesis\, a lentiviral-based expression system was developed for the overexpression of the NOX1/p22phox complex in HEK293 T-Rex cells. Initial attempts to determine the structure of wild-type NOX1 were unsuccessful due to low production yield and the small size of the complex\, compounded by the lack of a commercially available monoclonal antibody targeting NOX1. To overcome these limitations\, co-expression with the EROS chaperone\, combined with the engineering of a NOX1 mutant\, named NOX12\, enabled improved production. This mutant incorporates modifications in extracellular loops to allow specific recognition by the anti-NOX2 Fab7D5. This strategy increased particle size\, allowing particle alignment and facilitating structural determination of the complex by cryo-EM. High-resolution structure of the core of NOX12 in complex with p22phox and Fab7D5 was determined at an overall resolution of 2.8 Å. In addition\, the structure of the NOX12/p22phox in complex with EROS and Fab7D5 was resolved at an overall resolution of 3.2 Å. This structure revealed a previously uncharacterised interaction mode between EROS and the catalytic subunit. Furthermore\, the structural framework enabled analysis of disease-associated mutations in NOX1 and provided insights into oxygen access pathways. \nThis work provides the first structural insights into NOX1 isoform in complex with its partner p22phox and together with the EROS chaperone\, establishing a framework for understanding its stabilisation and maturation. In addition\, the successful implementation of protein epitope engineering highlights a broadly applicable strategy for studying other NOX isoforms that lack specific antibodies\, in both resting and activated states\, thereby enabling cryo-EM characterisation across this family of MPs. Further studies will be required to elucidate the detailed molecular mechanisms underlying NOX1 activation. ​​​​ \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/soutenance-de-these-par-maria-val-pevida-cea-irig-ibs/
LOCATION:IBS – Salle des séminaires\, IBS 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Soutenance,Soutenance de Thèse
ORGANIZER;CN="IRIG - CEA":MAILTO:irig.communication@cea.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20261013T140000
DTEND;TZID=Europe/Paris:20261013T160000
DTSTAMP:20261008T150927Z
CREATED:20261008T150927Z
LAST-MODIFIED:20261008T150927Z
UID:10000294-1791900000-1791907200@sfp-alpes.fr
SUMMARY:Soutenance de Thèse par Thomas VASSELON
DESCRIPTION:Dynamics of ultrashort plasmonic excitations in nanoelectronic quantum circuits\nLa soutenance  se déroulera en anglais. \nRésumé : \nLes technologies quantiques nécessitent des plateformes physiques capables de transporter et de manipuler l’information quantique tout en préservant sa cohérence. Une alternative aux plateformes photoniques consiste à utiliser des électrons se propageant dans des nanostructures semi-conductrices\, donnant naissance au domaine de l’optique quantique électronique. Une manière de générer des excitations électroniques individuelles consiste à appliquer des impulsions de tension ultracourtes à une mer de Fermi\, générant des paquets d’ondes électroniques ou des excitations plasmoniques. Des travaux récents ont démontré des phénomènes d’interférence avec des paquets d’ondes électroniques individuels de 27 ps dans un interféromètre électronique de Mach–Zehnder. Cependant\, l’étendue spatiale de l’excitation restait comparable à la taille du dispositif. \nL’objectif de cette thèse est de générer des paquets d’ondes électroniques plus courts que la longueur caractéristique des circuits nanoélectroniques\, afin d’atteindre un régime dans lequel de nouveaux phénomènes d’interférence quantique induits par la charge sont attendus. Ces phénomènes hors équilibre\, connus sous le nom d’oscillations de charge dynamiques\, résultent d’une phase imprimée sur la mer de Fermi par les paquets d’ondes électroniques. Cette phase peut être sondée au moyen d’interféromètres électroniques en mesurant le courant en fonction de la charge injectée. \nDeux approches complémentaires sont étudiées pour accéder à ce régime. La première repose sur un interféromètre à base de boîte quantique fonctionnant avec une électronique conventionnelle dans le domaine des GHz\, où les premières signatures des oscillations de charge dynamiques sont observées. La seconde consiste à développer une nanoélectronique THz permettant de générer des impulsions de tension aussi courtes que 1 ps. Nous démontrons le contrôle actif de plasmons THz dans un guide d’onde électronique unidimensionnel. Ces travaux ouvrent la voie à l’observation des oscillations de charge dynamiques dans des dispositifs plus génériques\, tels que des interféromètres de Fabry–Pérot ou de Mach–Zehnder. \nCette thèse démontre une dynamique ultrarapide dans des circuits nanoélectroniques\, permettant d’atteindre de nouvelles frontières pour les circuits quantiques fonctionnant à des vitesses sans précédent. \n__________________________________________________________________________________________________________________________________ \nAbstract : \nQuantum technologies require physical platforms capable of transporting and manipulating quantum information while preserving coherence. An alternative to photonic platforms is to use electrons propagating through semiconductor nanostructures\, giving rise to the field of electron quantum optics. One way to generate single-electron excitations is to apply ultrashort voltage pulses to a Fermi sea\, generating electronic wavepackets or plasmonic excitations. Recent results demonstrated interferometry with 27-ps-long single-electron wavepackets in an electronic Mach-Zehnder. However\, the spatial extent of the excitation was comparable to the size of the device. \nThe aim of this thesis is to generate electronic wavepackets shorter than the characteristic length of nanoelectronic circuits\, reaching a regime where new charge-induced quantum interference is expected to arise. These out-of-equilibrium phenomena\, known as dynamical charge oscillations\, emerge from a phase imprinted onto the Fermi sea by the electronic wavepackets. This phase can be probed through electronic interferometers by measuring the current as a function of the injected charge. \nTwo complementary approaches are investigated to access this regime. The first relies on a quantum-dot-based interferometer operating with conventional GHz electronics\, where first signatures of dynamical charge oscillations are observed. The second consists of developing THz nanoelectronics to generate voltage pulses as short as 1 ps. We demonstrate active control of THz plasmons in a one-dimensional electronic waveguide. This opens a route towards observing dynamical charge oscillations in more generic devices\, such as Fabry–Pérot or Mach–Zehnder interferometers. \nThis thesis demonstrates ultrafast dynamics in nanoelectronic circuits\, reaching new frontiers for quantum circuits operating at unprecedented speeds. \n_ \nContact : christopher.bauerle@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/soutenance-de-these-par-thomas-vasselon/
LOCATION:CNRS – Bâtiment A\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38054\, France
CATEGORIES:Soutenance,Soutenance de Thèse
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