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DTSTART;TZID=Europe/Paris:20260528T130000
DTEND;TZID=Europe/Paris:20260528T140000
DTSTAMP:20260521T094049Z
CREATED:20260507T093329Z
LAST-MODIFIED:20260521T094049Z
UID:10000146-1779973200-1779976800@sfp-alpes.fr
SUMMARY:Vincent LACROIX  (LBBE - Lyon)
DESCRIPTION:Repeats : the dark side of transcriptome assembly\n_ \nContact : lucie.lamothe@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/vincent-lacroix-lbbe-lyon/
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:20260528T140000
DTEND;TZID=Europe/Paris:20260528T150000
DTSTAMP:20260430T122107Z
CREATED:20260430T121134Z
LAST-MODIFIED:20260430T122107Z
UID:10000139-1779976800-1779980400@sfp-alpes.fr
SUMMARY:Alexandre BUZDIN (LOMA\, Bordeaux)
DESCRIPTION:Optical and TeraHertz radiation methods of flux manipulation in superconductors\nRésumé : \nAlthough the average properties of vortex matter in superconductors can be tuned using magnetic fields\, temperature\, or electric currents\, the manipulation of individual Abrikosov vortices remains challenging and has only been demonstrated with advanced scanning local probe microscopies. Recently\, a far-field optical method was proposed\, leveraging local heating of the superconductor with a focused laser beam to enable fast and precise manipulation of individual vortices\, akin to optical tweezers. This development paves the way for creating laser-driven Josephson junctions controlled by optically driven Abrikosov vortices. \nAnother approach for manipulating single flux quanta involves the so-called inverse Faraday effect\, where circularly polarized radiation interacts with the superconducting condensate\, acting as an effective magnetic field that generates supercurrents and DC magnetic moments. By employing the time-dependent Ginzburg–Landau equation formalism\, we have analyzed the current-carrying states of a small superconducting ring illuminated by such radiation. Numerical simulations reveal the possibility of 100% on-demand switching between current-carrying states in the superconductor by controlling the helicity of the electromagnetic field polarization. \nFurthermore\, theoretical analysis suggests the feasibility of the electromagnetic drag effect in superconductors—the generation of DC supercurrents and second harmonic signals induced by microwave radiation incident on a superconducting surface. \nThese findings open pathways to the all-optical operation of superconducting devices\, including RF SQUID flux qubits. \n_ \nContact : florence.levy-bertrand@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/alexandre-buzdin-loma-bordeaux/
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:20260528T140000
DTEND;TZID=Europe/Paris:20260528T150000
DTSTAMP:20260430T130828Z
CREATED:20260430T130321Z
LAST-MODIFIED:20260430T130828Z
UID:10000143-1779976800-1779980400@sfp-alpes.fr
SUMMARY:Charles McCRORY (Chemistry and Macromolecular Science and Engineering - University of Michigan\, USA)
DESCRIPTION:Breaking Scaling Relationships in Molecular Electrocatalysts for the CO2 Reduction Reaction\nProfesseur invité UGA du 15/05 au 15/06/2026 \nRésumé : \nFor molecular electrocatalysts\, beneficial decreases in effective overpotential are typically correlated with detrimental decrease in catalytic activity. This scaling relationship arises when both effective overpotential and kinetic reactivity scale with metal site nucleophilicity. Our research strategy is to break typical molecular scaling  relationships by designing molecular electrocatalysts with redox-active ligands where the catalytic reaction is initiated by redox activation of the ligand. These systems decouple metal site nucleophilicity from effective overpotential\, thus allowing us to break the correlation between catalyst reactivity and effective overpotential. \nIn this talk\, we will discuss how incorporating electronic substituents onto the redox-active ligand structure of Co(pyridyldiimine) complexes facilitates ligand reduction and leads to an inverse molecular scaling relationship for electrocatalytic CO2 reduction. We will explore the strategy of incorporating cationic charges into the complex as a means of breaking and inverting scaling relationships both through the incorporation of charged substituents into the ligand scaffold and through construction of homo- and heterobimetallic Co-Co and Co-Zn complexes. We will also discuss whether the activity enhancement from these cationic substituents is best described as\nthrough-space electrostatic stabilization of reactive intermediates\, or through-bond inductive effects related to the stabilization of the catalytic intermediates. Finally\, we will explore how these complexes operate for CO2 reduction and other electrocatalytic reductions when incorporated into larger coordination polymers and macromolecular scaffolds. \n_ \nContact : cyrille.costentin@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/charles-mccrory-chemistry-and-macromolecular-science-and-engineering-university-of-michigan-usa/
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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