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DTSTART;TZID=Europe/Paris:20261106T110000
DTEND;TZID=Europe/Paris:20261106T120000
DTSTAMP:20261101T224649Z
CREATED:20261101T224603Z
LAST-MODIFIED:20261101T224649Z
UID:10000329-1793962800-1793966400@sfp-alpes.fr
SUMMARY:Diego GARCIA OVALLE (Université de Sherbrooke)
DESCRIPTION:Spin and orbital angular momentum in periodic solids : From nonmagnetic to magnetic materials\nLe séminaire théorie est financé par la fédération de recherche Quantalps. \nRésumé : \nOver the past few years\, the study of the electron’s degrees of freedom have received a major interest in condensed matter\, both theoretically and experimentally. In particular\, investigating the spin and the orbital angular momentum is a source of a fascinating landscape of new physics in periodic systems\, where materials that are effectively nonmagnetic and even composed with light elements can be used for the new generation of more efficient electronic devices. \nIn this talk\, I will explain from the theory point of view how these two fundamental properties of the electron have a dramatic impact on the nonequilibrium responses of quantum materials. Firstly\, in the nonmagnetic case\, I will describe how the angular momentum of the electron can be connected to the nonlinear Hall effect in noncentrosymmetric materials. When moving forward to analyze spin and orbital transport exclusively\, I will focus on distinguishing the role of spin-orbit coupling and the Rashba effect on the spin and orbital-to-charge conversion in materials without inversion symmetry\, which are key figures of merit for the optimization of the basic structures in data storage. Secondly\, we will switch the gear to ferromagnetic materials to discuss two distinct effects in low symmetry crystals that emerge from the trigonal warping of the Fermi surface: A special class of spin-orbit torque and the so-called crystalline in-plane Hall effect. Last but not least\, I will present an important prospect of my work that aims to exploit the spin and the orbital angular momentum in antiferromagnets and altermagnets from surface engineering. Here\, I will illustrate the instance of the nonequilibrium spin polarization reported very recently\, and its potential extension to superconductivity. Exploring nonequilibrium responses arising on the spin or the angular momentum serve not only as a probe of the electronic structure of quantum materials\, but also as tools that might shed light on how to control them externally for novel applications in spin-orbitronics. \n_ \nContact : serge.florens@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/diego-garcia-ovalle-universite-de-sherbrooke/
LOCATION:LPMMC – salle Roger Maynard (G421)\, CNRS - LPMMC 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
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DTSTART;TZID=Europe/Paris:20261106T110000
DTEND;TZID=Europe/Paris:20261106T120000
DTSTAMP:20261103T221933Z
CREATED:20261103T221733Z
LAST-MODIFIED:20261103T221933Z
UID:10000344-1793962800-1793966400@sfp-alpes.fr
SUMMARY:Thibaud RENAULT
DESCRIPTION:The bacterial flagellum : assembly\, function… and beyond\nRésumé : \nThe bacterial flagellum is a complex nanomachine built through tightly coordinated processes at both the genetic and protein levels. Flagellar biogenesis begins in the inner membrane\, where a flagellum-specific chaperone facilitates the assembly of the core export apparatus. Once active\, the flagellar type-III secretion system (fT3SS) secretes structural components at a remarkable speed\, elongating the flagellar filament several micrometers beyond the cell surface. I will discuss the molecular features of the fT3SS\, how these impact important cellular functions such as membrane integrity\, bacterial fitness or acquisition of motility\, and how we can leverage them to engineer biotechnological and biomedical applications. \n_ \nContact : eric.faudry@univ-grenoble-alpes.fr \n 
URL:https://sfp-alpes.fr/event/thibaud-renault/
LOCATION:IBS – Salle des séminaires\, IBS 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IBS":MAILTO:ibs.seminaires@ibs.fr
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DTSTART;TZID=Europe/Paris:20261106T123000
DTEND;TZID=Europe/Paris:20261106T131500
DTSTAMP:20261102T231542Z
CREATED:20261008T151437Z
LAST-MODIFIED:20261102T231542Z
UID:10000295-1793968200-1793970900@sfp-alpes.fr
SUMMARY:Carine SEBI et Laurent GRIOT (GEM)
DESCRIPTION:Myopie stratégique de l’UE face à sa dépendance au Gaz russe : comment en est-on arrivé là ?\nRésumé : \nLes vingt-deux premières années de ce siècle ont vu se mettre en œuvre une politique européenne profondément paradoxale : les pays membres de l’UE ont\, à des degrés divers\, fait de la Russie leur principal fournisseur de gaz alors que tout indiquait que cette dépendance pourrait devenir une arme géopolitique. Comment et pourquoi l’UE était-elle dans cette situation au début de la guerre en Ukraine en 2022 ? Quelles en sont les conséquences aujourd’hui ? \nÀ propos des intervenants : \nCarine SEBI est professeur à Grenoble Ecole de Management\, et dirige l’Institut Energy for Society qui valorise et diffuse des projets de recherche de l’équipe Management de l’Energie et de l’Environnement. Elle est spécialisée dans l’évaluation des politiques publiques (énergies renouvelables\, l’efficacité énergétique\, géopolitique de l’énergie)\, et dans l’analyse de nouvelles formes organisationnelles avec l’outil des business models (ex. communautés énergétiques). \nLaurent GRIOT est enseignant chercheur en géopolitique à Grenoble Ecole de Management\, son travail porte notamment sur la question de la sûreté d’entreprise et de la gestion des risques géopolitiques. \n_ \nContact : contact@giant-grenoble.org
URL:https://sfp-alpes.fr/event/carine-sebi-et-laurent-griot-gem/
LOCATION:Amphi Minatec\, 3 parvis Louis Néel\, Grenoble\, 38054\, France
CATEGORIES:Séminaire
ORGANIZER;CN="GIANT":MAILTO:giant.campus@cea.fr
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