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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250408T100000
DTEND;TZID=Europe/Paris:20250408T120000
DTSTAMP:20260404T144353
CREATED:20250408T063134Z
LAST-MODIFIED:20250408T063428Z
UID:10000003-1744106400-1744113600@sfp-alpes.fr
SUMMARY:Nanofluidics meets condensed-matter physics : challenges and perspectives at the Quantum Plumbing Lab
DESCRIPTION:Nikita Kavokine (EPFL\, Switzerland)\n\n\n The hydrodynamic wall has traditionally been considered a featureless object\, whose only role is to provide a boundary for the fluid flow. Yet\, there is now ample evidence that at nanometer scales\, fluid flows are sensitive to the wall’s internal degrees of freedom. Recently\, we have developed a field theory formalism that captures the interaction between interfacial liquid flows and the wall’s electronic excitations\, in the form of a phenomenon termed quantum friction. In this talk\, I will show how quantum friction theory both sheds light on existing experiments\, and predicts new couplings between liquid flows and electronic currents\, with potential applications at the water-energy nexus. I will also highlight the many questions that it leaves unanswered\, along with the experimental program that we are deploying to solve them at the Quantum Plumbing Lab. \nContact : romain.lhermerout@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/nanofluidics-meets-condensed-matter-physics-challenges-and-perspectives-at-the-quantum-plumbing-lab/
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:20250424T140000
DTEND;TZID=Europe/Paris:20250424T150000
DTSTAMP:20260404T144353
CREATED:20250418T085804Z
LAST-MODIFIED:20250418T085804Z
UID:10000004-1745503200-1745506800@sfp-alpes.fr
SUMMARY:How AI can help us elucidate chemical reaction mechanisms ? / Comment l'IA peut nous aider à élucider les mécanismes des réactions chimiques ?
DESCRIPTION:Rolf DAVID (DCM\, Equipe SiTH)
URL:https://sfp-alpes.fr/event/how-ai-can-help-us-elucidate-chemical-reaction-mechanisms-comment-lia-peut-nous-aider-a-elucider-les-mecanismes-des-reactions-chimiques/
LOCATION:DCM\, Salle de C209 Bât Chimie Recherche\, St Martin d'Hères\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250507T110000
DTEND;TZID=Europe/Paris:20250507T120000
DTSTAMP:20260404T144353
CREATED:20250425T083338Z
LAST-MODIFIED:20250425T083338Z
UID:10000006-1746615600-1746619200@sfp-alpes.fr
SUMMARY:Isotropic amorphous topological phases - Daniel VARJAS
DESCRIPTION:Résumé : \nTopological phases of matter are distinguished by robust properties that are insensitive to perturbations. These include quantized responses\, perfectly conducting interfaces\, and exactly zero energy modes\, with wide-ranging technological applications. Recent years saw the complete classification of topological band structures\, revealing an abundance of topological crystalline insulators. Many questions about the robustness of these phases to disorder are\, however\, still open. We develop new theoretical and numerical methods based on local topological markers and effective momentum-space Hamiltonians to study topological phases in disordered systems. We introduce symmetry indicators for amorphous systems\, and we also demonstrate that it is possible to construct a fully isotropic and inversion-symmetric three-dimensional medium where time-reversal symmetry is systematically broken. We propose an amorphous system with scalar time-reversal symmetry breaking\, implemented by hopping through chiral magnetic clusters along the bonds. The average spatial symmetries alone protect a statistical topological insulator phase in this system\, analogous to crystalline mirror Chern insulators. We also show the expected transport properties of a three-dimensional statistical topological insulator\, which remains critical on the surface for odd values of the invariant.
URL:https://sfp-alpes.fr/event/isotropic-amorphous-topological-phases-daniel-varjas/
LOCATION:LPMMC\, CNRS - Bat G\, salle Roger Maynard G-421\, Grenoble
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250616T110000
DTEND;TZID=Europe/Paris:20250616T120000
DTSTAMP:20260404T144353
CREATED:20250612T111344Z
LAST-MODIFIED:20250612T111405Z
UID:10000007-1750071600-1750075200@sfp-alpes.fr
SUMMARY:Structure and transport in 2D-nanoconfined electrolytes - Damien TOQUER (ENS Paris)
DESCRIPTION:Résumé : \nRecent experimental advances in nanofluidics have enabled the exploration of ion transport across molecular-scale pores. Conductance and flow measurements show that electrostatic coupling between the ions and the confining walls plays a major role. Despite these advances\, direct measurements of ionic behaviour in such small systems remain challenging. Numerical simulations and theoretical modelling help break down complex phenomena into simple physical ingredients. \nI will first show that the electrostatic interactions between the ions are enhanced by the confinement of the electric field. As a result\, the ions become strongly correlated over long distances. One consequence of these correlations is ionic pairing\, which suppresses linear ionic conduction at low voltage drop\, in accord with experiments in MoS2 nanochannels. This effect shows promising applications in the active domain of ionic memristors. [1] \nI will then show that those strong correlations allow the emergence of collective charge fluctuations of the ions. Those fluctuation modes can couple with plasmonic modes in the solid\, and directly affect the transport properties of the flow\, in particular in systems with a strong physisorbed surface charge. This paves the way for smart tuning of liquid transport by solid engineering\, with possible applications to ion separation and desalination technologies. [2] \n[1] Damien Toquer\, Lydéric Bocquet\, Paul Robin; Ionic association and Wien effect in 2D confined electrolytes. J. Chem. Phys. 14 February 2025; 162 (6): 064703. https://doi.org/10.1063/5.0241949\n[2] Damien Toquer\, Baptiste Coquinot\, Nikita Kavokine\, Lydéric Bocquet [In preparation]
URL:https://sfp-alpes.fr/event/structure-and-transport-in-2d-nanoconfined-electrolytes-damien-toquer-ens-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:20251006T000000
DTEND;TZID=Europe/Paris:20251008T235959
DTSTAMP:20260404T144353
CREATED:20250718T161252Z
LAST-MODIFIED:20260124T032820Z
UID:10000008-1759708800-1759967999@sfp-alpes.fr
SUMMARY:SEMINAIRE DANIEL DAUTREPPE 2025 : Quantum Sciences & Technologies
DESCRIPTION:Website : dautreppe2025.sciencesconf.org \nTopics of this PhD training school on Quantum Sciences and Technologies. \nSix expert lecturers have been chosen for their pedagogical skills. \nEach lecturer will give a 3-hour class designed to take you from masters level to the cutting edge of research in a given topic. \nSpecifically : \n– Quantum circuits and algorithms – Hui Khoon Ng (Yale-NUS\, Singapore) \n– Quantum cryptography – Ramona Wolf (University of Siegen\, Germany) \n– Superconducting circuits – Ioan Pop (Karlsruhe Institute of Technology [KIT] & Stuttgart University\, Germany) \n– Photonics – Julien Claudon (IRIG\, CEA-Grenoble) \n– Quantum sensing – Benjamin Pigeau (Inst. Néel\, Université Grenoble Alpes & CNRS) \n– Quantum matter – Cécile Repellin (LPMMC\, Université Grenoble Alpes & CNRS) \n  \nThis training school will be an excellent preparation to understand presentations and posters at QuantAlps Days 2025 (Grenoble 13-14 Oct 2025) and the annual workshop of the GDR-TeQ “Technology Quantique” (Grenoble Nov 2025 – date to be confirmed). \nTarget Audience : The school is for anyone doing a PhD in Quantum Sciences or Technologies in Grenoble (and it is open to others in the limit of available space). \nHistory : This PhD training school is in the series called the Seminaires Dautreppe\, that have been organized in Grenoble since 1969 by the Alpes section of the  Société Française de Physique (each year on a different topic). This year it is being organized jointly with QuantAlps\, on the theme of the Unesco’s “2025 International Year of Quantum Sciences and Technologies”. \n  \nThe organizing committee of the Dautreppe PhD training school on Quantum Science & Technologies : \nJoël Cibert (SFP Alpes) CNRS Institut Néel \nRobert Whitney (SFP Alpes & QuantAlps) CNRS LPMMC \nAnna Minguzzi (Director of QuantAlps) CNRS LPMMC \nFrank Balestro (Director of QuantEdu) Professor Université Grenoble Alpes  \nValentin Savin (QuantAlps) CEA Leti \nHermann Sellier (QuantAlps) CNRS Institut Néel \nAlastair Abbott (QuantAlps) Inria Grenoble \nRomain Maurand (QuantAlps) CEA PHELIQS \nClemens Winkelmann (QuantAlps) Grenoble-INP \nParinaz Tajabor (QuantAlps Project Manager) Université Grenoble Alpes
URL:https://sfp-alpes.fr/event/seminaire-daniel-dautreppe-2025-quantum-sciences-technologies/
CATEGORIES:Conférence
ORGANIZER;CN="SFP Alpes":MAILTO:contact@sfp-alpes.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260126T110000
DTEND;TZID=Europe/Paris:20260126T120000
DTSTAMP:20260404T144353
CREATED:20260123T152423Z
LAST-MODIFIED:20260124T031309Z
UID:10000017-1769425200-1769428800@sfp-alpes.fr
SUMMARY:Jean CAPPELLO (Institut Lumière Matière\, Lyon)
DESCRIPTION:Transport of beads\, bubbles and droplets in cylindrical microchannel : The role of inertia and deformations\nAbstract : \nWhen transported in microchannels at intermediate Reynolds number\, beads\, droplets or bubbles show interesting dynamics such as lateral migration. For rigid beads this migration is solely induced by inertial forces which lead to lateral motion of the particle until it reaches an equilibrium uncentered position in the microchannel. Transport of deformable objects as droplets or bubbles is even richer as the coupling between deformation and the external flow results in another lateral migration force whose orientation depends on the viscosity ratio of the two phases. I will present a study in which we investigate\, both experimentally and numerically\, the velocity and lateral position of beads\, droplets and bubbles transported in a cylindrical pipe. By varying the object size\, the viscosity ratio\, the density\, the Reynolds number and the capillary number\, we offer an exhaustive parametric study exploring various dynamics from the non-deformable viscous regime to the deformable inertial regime\, thus enabling us to highlight the sole and combined roles of inertia and capillary effects on lateral migration. Then\, focusing on the specific case of bubbles\, we further identify an intriguing regime at large deformations in which bubbles travel faster than the maximum velocity of the carrier flow. We rationalize this behavior in the limit of large bubbles and show that it originates from a reduction of the hydraulic resistance of the multiphase system. Finally\, we determine the key parameters governing the onset of this “superfast” regime and demonstrate that it occurs only within a limited range of capillary and Reynolds numbers. \nContact : elise.lorenceau@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/transport-of-beads-bubbles-and-droplets-in-cylindrical-microchannel-the-role-of-inertia-and-deformations/
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:20260128T110000
DTEND;TZID=Europe/Paris:20260128T120000
DTSTAMP:20260404T144353
CREATED:20260124T010421Z
LAST-MODIFIED:20260124T012948Z
UID:10000021-1769598000-1769601600@sfp-alpes.fr
SUMMARY:Giovanni FINOCCHIO (University of Messina\, Italy)
DESCRIPTION:Adaptive Ising Machines : a paradigm combining oscillatory dynamics and probabilistic sampling\nRésumé : \nThe first part of the talk will focus on probabilistic computing which is one direction to implement Ising Machines with Probabilistic computing that is a computational paradigm using probabilistic bits (p-bits)\, unit in the middle between standard bit and q-bits. I will show how to map hard combinatorial optimization problems (Max-Sat\, Max-Cut\, etc) into Ising machine and how to implement those in spintronic technology. I will present new directions in this field considering the concept of extended probabilistic variables such as p-dit and p-int. I will then discuss oscillatory Ising Machines dynamics with the aim of introducing the concept of Adaptive Ising Machines. For doing that\, first I will discuss the universal theory of phase auto-oscillators driven by a bi-harmonic signal (having frequency components close to single and double of the free-running oscillator frequency) with noise showing how deterministic phase locking and stochastic phase slips can be continuously tuned by varying the relative amplitudes and frequencies of the driving components. I will then focus on how to use spin-torque nano-oscillators for implementing deterministic\, probabilistic computing and dual-mode operation of Adaptive Ising Machines that dynamically combines both regimes within the same hardware platform by properly tuning noise strength and a bi-harmonic excitation. Benchmarking on different classes of combinatorial optimization problems\, the CoIM exhibits complementary performance as compared to OIMs and probabilistic Ising machines PIMs\, with adaptability to the specific problem class. This work introduces the first oscillator-based Ising machine capable of transitioning between deterministic and probabilistic computation\, opening a path toward scalable\, CMOS-compatible hardware for hybrid optimization and inference. This work was supported under the project number 101070287 — SWAN-on-chip — HORIZON-CL4-2021-DIGITAL-EMERGING-01\, the project PRIN 2020LWPKH7 funded by the Italian Ministry of University and Research and by the PETASPIN association (www.petaspin.com) and it has been also funded by European Union (NextGeneration EU)\, through the MUR-PNRR project SAMOTHRACE (ECS00000022). \nContact : admin.spintec@cea.fr
URL:https://sfp-alpes.fr/event/adaptive-ising-machines-a-paradigm-combining-oscillatory-dynamics-and-probabilistic-sampling/
LOCATION:CEA – Salle de Séminaire IRIG (1005 – 445)\, Laboratoire Irig/Spintec\, salle de séminaire 445\, bâtiment 1005\, CEA-Grenoble\, Grenoble
CATEGORIES:Séminaire
ORGANIZER;CN="IRIG - CEA":MAILTO:odile.rossignol@cea.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260128T110000
DTEND;TZID=Europe/Paris:20260128T120000
DTSTAMP:20260404T144353
CREATED:20260123T162130Z
LAST-MODIFIED:20260124T031950Z
UID:10000020-1769598000-1769601600@sfp-alpes.fr
SUMMARY:Juan POLO (Technology Innovation Institute\, Abu Dhabi)
DESCRIPTION:Static impurity in a mesoscopic system of SU(N) fermionic matter-wavesJuan POLO \nAbstract : \nWe investigate the effects of a static impurity\, modeled by a localized barrier\, in a one-dimensional mesoscopic system comprised of strongly correlated repulsive SU(N)-symmetric fermions. For a mesoscopic sized ring under the effect of an artificial gauge field\, we analyze the particle density and the current flowing through the impurity at varying interaction strength\, barrier height and number of components. We find a non-monotonic behaviour of the persistent current\, due to the competition between the screening of the impurity\, quantum fluctuations\, and the phenomenon of fractionalization\, a signature trait of SU(N) fermionic matter-waves in mesoscopic ring potentials. This is also highlighted in the particle density at the impurity site. We show that the impurity opens a gap in the energy spectrum selectively\, constrained by the total effective spin and interaction. Our findings hold significance for the fundamental understanding of the localized impurity problem and its potential applications for sensing and interferometry in quantum technology. \nContact : pierre.nataf@lpmmc.cnrs.fr
URL:https://sfp-alpes.fr/event/static-impurity-in-a-mesoscopic-system-of-sun-fermionic-matter-waves/
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:20260131T000000
DTEND;TZID=Europe/Paris:20260131T235959
DTSTAMP:20260404T144353
CREATED:20260124T040835Z
LAST-MODIFIED:20260129T103601Z
UID:10000031-1769817600-1769903999@sfp-alpes.fr
SUMMARY:33e édition des olympiades de physique
DESCRIPTION:Ce concours scientifique expérimental destiné aux lycéens\, permet à de petites équipes d’élèves de vivre pendant plusieurs mois une passionnante aventure scientifique autour d’un projet expérimental dont ils choisissent librement le sujet et dans lequel ils vont pouvoir laisser s’exprimer leur créativité et leur initiative. \nLe samedi 31 janvier de 10h à 15h30\, venez découvrir leurs travaux lors de l’exposition publique dans la Grande Verrière du Château Saint-Léger. \nA l’issue de l’exposition publique\, une conférence passionante « Des concepts aux applications : les deux révolutions quantiques » par Alain Aspect\, prix Nobel de physique 2022\, sera proposée dans le Grand Auditorium de 16h30 à 17h30. \nPlus d’informations : \nhttps://www.eventbrite.fr/e/billets-33e-edition-des-olympiades-de-physique-1977023995992?aff=oddtdtcreator \niX campus – 34 rue de la Croix de Fer – 78100 St-Germain-en-Laye (France)\nContact : emma.gosse@orange.fr
URL:https://sfp-alpes.fr/event/33e-edition-des-olympiades-de-physique/
LOCATION:St-Germain-en-Laye\, iX campus
CATEGORIES:Evènements
ATTACH;FMTTYPE=image/png:https://sfp-alpes.fr/wp-content/uploads/2026/01/SFPevent-4.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260202T110000
DTEND;TZID=Europe/Paris:20260202T120000
DTSTAMP:20260404T144353
CREATED:20260129T120516Z
LAST-MODIFIED:20260130T141207Z
UID:10000035-1770030000-1770033600@sfp-alpes.fr
SUMMARY:Sara MATYAS (CNRS Innovation)
DESCRIPTION:Continuum des financements des projets de valorisation\nRésumé : \nLes financements de valorisation sont nombreux\, chacun avec ses guichets\, ses règles et ses critères… Et si on éclaircissait ce sujet ensemble ? À partir d’exemples concrets\, nous parcourrons les différents chemins possibles pour valoriser un projet de recherche\, depuis l’idée fondamentale jusqu’à sa valorisation. Vous verrez que la start‑up n’est qu’une option parmi d’autres. L’objectif : décoder clairement les informations essentielles à retenir pour chaque type de financement et comprendre la dynamique du continuum (Pré‑maturation CNRS\, Pré‑maturation PUI\, Maturation SATT\, programme RISE\, BTF Lab\, Incubation\, Transfert\, Licensing…). \nContact : bahram.houchmandzadeh@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/continuum-des-financements-des-projets-de-valorisation/
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:20260203T140000
DTEND;TZID=Europe/Paris:20260203T150000
DTSTAMP:20260404T144353
CREATED:20260124T033007Z
LAST-MODIFIED:20260124T033150Z
UID:10000023-1770127200-1770130800@sfp-alpes.fr
SUMMARY:Mandar M. DESHMUKH (Tata Institute of Fundamental Research\, India)
DESCRIPTION:2D van der Waals Josephson devices\nRésumé : \nI will discuss two classes of Josephson devices. First\, proximitized graphene-based Josephson junctions that are gate tunable. The graphene Josephson FET enables a quantum-noise-limited parametric amplifier with performance comparable to the best discrete amplifiers in this class [1]. One can realize extremely sensitive and fast bolometers [2] – useful for dark matter search\, among other applications. Second\, twisted van der Waals heterostructures based on the high-temperature superconductor Bi2Sr2CaCu2O8 et δ enable the realization of a high-temperature Josephson diode [3] for the first time. Such Josephson diodes offer an opportunity to realize new devices at liquid nitrogen temperatures. While opportunities abound with vdW JJs\, the challenge of scalability must be overcome to translate them into real-world devices. \nReferences : \n[1] « Quantum-noise-limited microwave amplification using a graphene Josephson junction » Joydip Sarkar et al. \, Nature Nanotechnology 17\, 1147 (2022).  \n[2] “ Kerr non-linearity enhances the response of a graphene Josephson bolometer\,” Sarkar et al. \, Nature Communications volume 16\, 7043 (2025).  \n[3] « High-temperature Josephson diode\, » Sanat Ghosh et al. Nature Materials 23\, 612 (2024). \n  \nContact : equipe-seminaires-nano@listes.grenoble.cnrs.fr
URL:https://sfp-alpes.fr/event/mandar-m-deshmukh-tata-institute-of-fundamental-research-india/
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:20260205T140000
DTEND;TZID=Europe/Paris:20260205T150000
DTSTAMP:20260404T144353
CREATED:20260129T152413Z
LAST-MODIFIED:20260129T152615Z
UID:10000036-1770300000-1770303600@sfp-alpes.fr
SUMMARY:Flavien MUSEUR (PSI / ETH Zurich)
DESCRIPTION:Artificial spin ice on the CaVO lattice : a bridge from square to kagome\nRésumé : \nArtificial spin ices are arrangements of dipolar-coupled nanomagnets\, with magnetic moments that behave like Ising spins as a result of shape anisotropy. They have been successfully implemented as platforms for imaging and controlling phase transitions in systems with long-range interactions [1]. However\, the exploration of thermally-activated phase transitions has been mostly focused on two lattices: the square and the kagome. Artificial square ice orders readily into an antiferromagnetic\, two-in/two-out ground state\, with a transition belonging to the Ising 2D universality class [2]. In contrast\, artificial kagome ice is highly frustrated and the predicted phase diagram is richer [3\, 4]. Upon lowering the temperature\, the system first experiences a crossover from a paramagnetic to a spin liquid state with no long range order\, then transitions into a Coulomb phase with charge crystallization. This is an example of magnetic moment fragmentation [5\, 6]\, in which each magnetic moment can be decomposed into the sum of a long-range ordered\, divergence-full fragment and a fluctuating\, divergence-free fragment which can be elegantly mapped to a dimer model. \nWe have carried out a comprehensive characterization of the thermodynamics of an artificial spin ice based on the CaVO (also called the square-octagon) lattice\, part of the family of Archimedean lattices [7]. We show that the magnetic interactions on the vertex level can be significantly tuned by changing the relative sizes of square and octagonal plaquettes\, while preserving the lattice constant and symmetries. This results in a complex phase diagram\, with two very different ground states and ordering processes separated by a multicritical region. Each bears strong similarities with either the square or kagome phenomenologies. We map out this phase diagram with Monte-Carlo simulations and magnetic force microscopy of as-grown configurations. Different spin liquid states can be observed\, as well as moment fragmentation for some geometries. Finally\, we perform temperature and field-dependant magnetometry measurements on a series of lattice geometries\, making it possible to detect thermally-active correlated phases without using large-scale instrumentation. Our work paves the way for engineering exotic magnetic properties at the mesoscale. By tuning frustration within a single lattice geometry\, we can design artificial systems that exhibit spin liquid and multicritical behaviours – something that\, in natural magnetic systems\, typically requires extremes of either pressure\, field or temperature. \n\nS. H. Skjærvø et al.\, Nature Reviews Physics 2\, 13–28 (2019).\nO. Sendetskyi et al.\, Physical Review B 99\, 214430 (2019).\nG. Möller and R. Moessner\, Physical Review B 80\, 140409 (2009).\nG.-W. Chern et al.\, Physical Review Letters 106\, 207202 (2011).\nM. E. Brooks-Bartlett et al.\, Physical Review X 4\, 011007 (2014).\nB. Canals et al.\, Nature Communications 7\, 11446 (2016).\nO. A. Starykh et al.\, Physical Review Letters 77\, 2558–2561 (1996).\n\nContact : elsa.lhotel@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/flavien-museur-psi-eth-zurich/
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:20260206T103000
DTEND;TZID=Europe/Paris:20260206T123000
DTSTAMP:20260404T144353
CREATED:20260124T034725Z
LAST-MODIFIED:20260130T141434Z
UID:10000028-1770373800-1770381000@sfp-alpes.fr
SUMMARY:Doru C. LUPASCU (Institute for Materials Science and CENIDE - Faculty of Engineering\, University of Duisburg-Essen)
DESCRIPTION:Hyperfine Interactions as a Probe in Solids : The Example of a Multiferroic System : Bismuth Ferrite\nHyperfine interactions denote the coupling of the wave functions of nuclear states to the electronic shell of the atom. This coupling is a correction term to the energy of a nuclear state and equally so in reverse manner for the electronic shell of the atom. \nLike nuclear magnetic resonance or Mössbaer spectroscopy\, the nuclear perturbed gamma-gamma-angular correlation spectroscopy (PAC) investigates this energetic modification of the nuclear state. For sufficiently high nuclear spin value\, magnetic interactions as well as quadrupole interactions become accessible. The beauty of the method is its highly local character in the crystal lattice. It directly monitors fields at a particular lattice or defect site. Similar is true for molecules. \nBismuth ferrite is a perovskite crystal exhibiting magnetic and electric ordering phenomena. It is antiferromagnetic and a very good ferroelectric. We used several probe atoms that offer suitable nuclear gamma-gamma cascades to understand these two ordering phenomena in the identical crystal and their coupling. Different from the long term belief\, we proved that there is no magnetoelectric coupling in this crystal.\nThe presentation will introduce the measurement method\, and the material system and display how it can be used to investigate solids in a very local manner. \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
URL:https://sfp-alpes.fr/event/doru-c-lupascu-institute-for-materials-science-and-cenide-faculty-of-engineering-university-of-duisburg-essen/
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:20260206T110000
DTEND;TZID=Europe/Paris:20260206T120000
DTSTAMP:20260404T144353
CREATED:20260129T154158Z
LAST-MODIFIED:20260129T154158Z
UID:10000037-1770375600-1770379200@sfp-alpes.fr
SUMMARY:William FAUGNO (LKB / Collège de France)
DESCRIPTION:Quantum Many-Body Scars in the Presence of Density-Difference-Dependent Hopping\nRésumé : \nIt has been observed that isolated quantum systems often still produce measured values consistent with thermalization. This is unexpected due to the lack of a notion of chaos or ergodicity and the unitary dynamics of the quantum theory which is at its core linear. The conditions under which we can expect isolated quantum systems to thermalize were laid out in the eigenstate thermalization hypothesis (ETH)\, which has generally been found to hold in a variety of systems. Still\, notable violations of the ETH have been identified where a seemingly chaotic many-body quantum system exhibits some nonthermal behavior. In this talk\, I will introduce the concept of quantum many-body scars (QMBS)\, a phenomenon in which a small subset of eigenstates violates the ETH and promote nonthermal dynamics. I will then present theoretical results on a bosonic Hamiltonian with a density-dependent hopping and describe two distinct mechanisms for scar formation that arise in this model. These mechanisms provide insight into the conditions under which QMBS can be expected to occur. \nContact : serge.florens@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/william-faugno-lkb-college-de-france/
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:20260206T110000
DTEND;TZID=Europe/Paris:20260206T120000
DTSTAMP:20260404T144353
CREATED:20260124T035020Z
LAST-MODIFIED:20260130T140553Z
UID:10000029-1770375600-1770379200@sfp-alpes.fr
SUMMARY:Kei YAMAMOTO (Advanced Science Research Center\, Japan)
DESCRIPTION:Spin-wave spectrum in a ferromagnetic disk\nAbstract : \nAngular momentum transfer in all forms contributes to the loss of information carried by dynamical spin polarisations and constitutes an important fundamental problem in spintronics. In this talk\, we present a detailed microwave spectrum measurement of magnetic excitations in an Yttrium Iron Garnet disk\, and how one can make sense of the multitudes of spectral lines and their magnetic field dependence theoretically. We explain how the axial symmetry of the setup leads to labelling of modes in terms of the conserved total angular momentum of the spin waves\, The frequency spectrum in the saturated state is compared to analytical solutions for pure exchange as well as pure dipolar models under certain limits where different types of spectral degeneracy occur. The experimental result shows splittings of those degenerate modes\, and we discuss possible interpretations in relation to angular momentum transfer between its different forms.\n​​\nMore information :https://www.spintec.fr/seminar-spin-wave-spectrum-in-a-ferromagnetic-disk/​​​\n​\nVisioconference :https://univ-grenoble-alpes-fr.zoom.us/j/98769867024?pwd=dXNnT3RMeThjYStybGVQSUN0TVdJdz09​​
URL:https://sfp-alpes.fr/event/kei-yamamoto-advanced-science-research-center-japan/
LOCATION:CEA – Salle de Séminaire IRIG (1005 – 445)\, Laboratoire Irig/Spintec\, salle de séminaire 445\, bâtiment 1005\, CEA-Grenoble\, Grenoble
CATEGORIES:Séminaire
ORGANIZER;CN="IRIG - CEA":MAILTO:odile.rossignol@cea.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260209T110000
DTEND;TZID=Europe/Paris:20260209T120000
DTSTAMP:20260404T144353
CREATED:20260129T155208Z
LAST-MODIFIED:20260130T142114Z
UID:10000038-1770634800-1770638400@sfp-alpes.fr
SUMMARY:Isidora ARAYA DAY (DIPC San Sebastian)
DESCRIPTION:Diagnosing higher order topological phases with electronic transport\nRésumé : \nUnlike a quantum Hall bar\, a higher-order topological insulator may not have edge modes that conduct\, but localized corner modes. These corner modes are robust to disorder and their appearance is diagnosed by a topological invariant that takes both onsite and spatial symmetries. In this talk\, I will introduce a scattering theory for detecting higher-order topological phases only from a sample’s Fermi level properties\, and will demonstrate how to apply it to different models. This theory provides an alternative approach for proving bulk–edge correspondence in intrinsic higher order topological phases\, especially in presence of disorder\, and it relies on the spectral flow that these phases show in the presence of magnetic flux. \nContact : serge.florens@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/isidora-araya-day-dipc-san-sebastian/
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:20260210T103000
DTEND;TZID=Europe/Paris:20260210T113000
DTSTAMP:20260404T144353
CREATED:20260205T153331Z
LAST-MODIFIED:20260205T153331Z
UID:10000051-1770719400-1770723000@sfp-alpes.fr
SUMMARY:Stéphanie ROCCIA (LPSC-CNRS/UGA\, Grenoble)
DESCRIPTION:The search for neutron electric dipole moment at PSI\nRésumé : \nThe Universe and its history are simultaneously very well understood and still a big mystery. We have amazing tools from satellites to\nobservatories to weight the universe over its history. But the components of the Universe can simply not yet be explained by physicists. To get the full picture\, we need to identify and understand the interactions at play throughout the life of the Universe. This is the meeting point between particle physics and cosmology. At this meeting point stands the neutron\, a common particle that we can uniquely use in high precision experiments.\nI will present how experiments searching for a permanent electric dipole moment of the neutron (nEDM) aim at discovering new sources of CP violation beyond the Standard Model of particle physics and understanding the origin of the matter-antimatter asymmetry of the Universe. The quest for the neutron electric dipole moment started more than sixty years ago. In recent experiments\, polarized ultra-cold neutrons are stored in material bottles.\nI will present the ongoing efforts at the Paul Scherrer Institute in Switzerland where the n2EDM spectrometer has taken the first “physics data” in 2025. A large fraction of this dataset is dedicated to measurements of the UCN spectrum. I will present the newest UCN spectroscopy techniques that were recently published and the reasons for the importance of a deep understanding of the UCN spectrum. \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
URL:https://sfp-alpes.fr/event/stephanie-roccia-lpsc-cnrs-uga-grenoble/
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:20260216T110000
DTEND;TZID=Europe/Paris:20260216T120000
DTSTAMP:20260404T144353
CREATED:20260212T154413Z
LAST-MODIFIED:20260212T154413Z
UID:10000058-1771239600-1771243200@sfp-alpes.fr
SUMMARY:Roxane LESTINI & Nicolas OLIVIER (Laboratoire d'Optique et Biosciences\, Palaiseau)
DESCRIPTION:Understanding DNA replication dynamics in the archaea Haloferax volcanii\nRésumé : \nArchaea provide a simplified yet highly informative model for deciphering the complex regulatory networks governing DNA replication and origin firing. Among them\, Haloferax volcanii has a circular chromosome with four active replication origins distributed across a 3.5 Mb DNA molecule and exhibit some distinctive properties\, such as a heterogeneous polyploidy\, carrying 10–18 copies of its genome. \nHow these highly polyploid organisms regulate the activation and timing of their multiple replication origins in coordination with cell growth and division remains an open question. To address this question\, we developed a multiscale approach\, implementing the STORM technique in archaea for the first time\, Marker Frequency Analysis by sequencing (MFA-seq) to capture the global replication profile at the population level\, and fluorescence in situ hybridization (FISH) to explore ploidy variation. \nOur findings reveal\, with an unprecedented resolution of ~30 nm\, new insights into the spatial regulation of replication foci\, demonstrating their organization into clusters. We further investigated DNA replication dynamics under varying growth conditions\, revealing a reduction in replication foci number that correlates with decreased replication rates and DNA content. By contrast\, altering the replication initiation mode—by inactivating all four replication origins—does not disrupt the overall replication dynamics. \nBy integrating these techniques\, we aim to characterize the replication program in H. volcanii and gain a deeper understanding of its regulation. \nContact : delphine.debarre@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/roxane-lestini-nicolas-olivier-laboratoire-doptique-et-biosciences-palaiseau/
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:20260217T140000
DTEND;TZID=Europe/Paris:20260217T150000
DTSTAMP:20260404T144353
CREATED:20260206T091214Z
LAST-MODIFIED:20260206T091214Z
UID:10000054-1771336800-1771340400@sfp-alpes.fr
SUMMARY:Francesco ROSA (Politecnico di Milano\, Italy)
DESCRIPTION:Magnetic and orbital properties of infinite-layer nickelate and cuprate superconductors\nRésumé : \nInfinite-layer (IL) nickelates recently gained strong interest thanks to their apparent analogies with cuprates\, including a square lattice-based structure dominated by superexchange antiferromagnetic interaction and the emergence of superconductivity upon hole doping. X-ray spectroscopies with synchrotron light are a very powerful tool for the investigation of such systems\, providing complementary information to the more traditional inelastic neutron scattering. In this seminar\, we discuss some of the recent results obtained by our group using both Resonant Inelastic X-ray Scattering (RIXS) and X-ray Magnetic Circular Dichroism (XMCD)\, mainly focusing on magnetism. RIXS results concern the analysis of dynamic spin excitations (magnons/paramagnons)\, investigating the effect of hole-doping on them and providing an estimate for the magnetic exchange coupling constants. Results on IL nickelates will be compared to analogous ones on cuprates\, highlighting analogies and differences. XMCD analysis is devoted to the static spin order in IL nickelates\, reporting the presence of a field induced out-of-plane Ni1+ spin moment. Based on magnetic field- and temperature-dependent measurements\, we justify our observations with an out-of-plane canting of in-plane anti-ferromagnetically correlated Ni1+ spins\, tentatively attributed to a symmetry lowering of the NiO2 planes. \n_ \nContact : andrew.fefferman@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/francesco-rosa-politecnico-di-milano-italy/
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:20260217T140000
DTEND;TZID=Europe/Paris:20260217T150000
DTSTAMP:20260404T144353
CREATED:20260205T161137Z
LAST-MODIFIED:20260205T161544Z
UID:10000053-1771336800-1771340400@sfp-alpes.fr
SUMMARY:Anton POTOCNIK (IMEC\, Belgium)
DESCRIPTION:High-coherence foundry-compatible superconducting qubit platform\nRésumé : \nThe field of superconducting qubit technology has experienced rapid development over the past two decades. Recent advancements in the fabrication\, control and measurement of superconducting quantum devices have enabled integration of hundreds of qubits on a single chip. However\, the path towards larger-scale integration of thousands of qubits on a chip remains unclear. This talk presents imec’s platform for scalable superconducting qubit fabrication\, which is based on foundry-compatible thin film processing 1 and overlay Josephson-junction fabrication 2. The platform enables all-optical superconducting transmon qubit fabrication on 300 mm wafers\, achieving near state-of-the-art coherence times\, record-low aging and comparable Josephson junction variability to standard shadow-evaporation technique 3. A key focus of this presentation will be the understanding and mitigation of microwave losses induced by various fabricaiton steps such as Ar-milling 4 and oxide removal 6\,7 and materials such as -Ta 5 or ultra-high-resistivity silicon. The talk will conclude with an outline of ongoing efforts toward large-scale qubit characterization and control using cryo-CMOS electronics operating near qubits at the mixing-chamber plate of a dilution refrigerator 8. \n1 Mongillo\, et al.\, IEDM (2022). \n2 Verjauw et al.\, npj Quantum Information 8\, 93 (2022). \n3 Van Damme\, et al.\, Nature\, 634\, 74 (2024). \n4 Van Damme\, et al.\, PRA 20\, 014034 (2023). \n5 Lozano\, et al. Mater. Quantum. Technol. 4\, 025801 (2024). \n6 Verjauw\, et al.\, PRA 16\, 014018 (2021). \n7 Lozano\, et al.\, Advanced Science 12\, e09244 (2025). \n8 Acharya\, et al.\, Nature Electronics\, 6\, 900 (2023). \n_ \nContact : equipe-seminaires-nano@listes.grenoble.cnrs.fr
URL:https://sfp-alpes.fr/event/anton-potocnik-imec-belgium/
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:20260217T140000
DTEND;TZID=Europe/Paris:20260217T150000
DTSTAMP:20260404T144353
CREATED:20260129T161723Z
LAST-MODIFIED:20260130T142159Z
UID:10000039-1771336800-1771340400@sfp-alpes.fr
SUMMARY:Igor ROZHANSKIY (National Graphene Institute\, University of Manchester)
DESCRIPTION:Interacting spin physics in 2D : flat bands\, SOC renormalization\, and chiral textures\nRésumé : \nTwo-dimensional materials and their heterostructures offer a controllable setting where exchange\, spin-orbit coupling (SOC)\, and electron interactions shape the spin-resolved electronic structure and response. This seminar links two recent directions of my work through this common theme.\nThe first part focuses on van der Waals magnets (chromium trihalides) combined with graphene. Narrow\, spin-polarized conduction bands make these systems susceptible to charge-transfer-driven doping and strong correlations. Using DFT-calibrated effective tight-binding models\, I will show how flat-band features and longer-range hopping processes determine the low-energy spectrum and favor regimes with heavy\, strongly interacting carriers.\n​ The second part addresses many-body renormalization of SOC in monolayer transition metal dichalcogenides. Exchange effects can enhance the conduction-band spin-orbit splitting in a density-dependent manner. I will outline ​the underlying mechanism and discuss how it can be inferred from gated transport and quantum-oscillation measurements\, including multilayer configurations where valley structure and interlayer coupling provide additional diagnostics.\nA short outlook will touch on chiral spin textures\, such as skyrmions\, and how real-space chirality can contribute to transverse signals\, emphasizing possible connections and open questions for 2D material platforms. \nhttps://www.cea.fr/drf/irig/Pages/Animation-scientifique/seminaires/2026_Rozhanskiy.aspx \nContact : admin.spintec@cea.fr
URL:https://sfp-alpes.fr/event/igor-rozhanskiy-national-graphene-institute-university-of-manchester/
LOCATION:CEA – Salle de Séminaire IRIG (1005 – 445)\, Laboratoire Irig/Spintec\, salle de séminaire 445\, bâtiment 1005\, CEA-Grenoble\, Grenoble
CATEGORIES:Séminaire
ORGANIZER;CN="IRIG - CEA":MAILTO:odile.rossignol@cea.fr
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260220T110000
DTEND;TZID=Europe/Paris:20260220T120000
DTSTAMP:20260404T144353
CREATED:20260212T160617Z
LAST-MODIFIED:20260212T160617Z
UID:10000060-1771585200-1771588800@sfp-alpes.fr
SUMMARY:Dmitri KHVESHCHENKO (University of North Carolina)
DESCRIPTION:Applied Hall-o-graphy with no strings attached\nRésumé : \nThis discussion aims at ascertaining the true status of the so-called applied-holographic approach to strongly correlated quantum matter. The latter ranges from ‘not even wrong’ for the constructions based on the ad hoc ‘AdS/CMT’ to ‘might be right\, albeit for the wrong reason’ for those emerging in the context of phase-space bosonization and the related ‘Hall-o-graphic’ hydrodynamics.The presentation will be made accessible to the wide audience of non-experts and students. \nContact : serge.florens@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/dmitri-khveshchenko-university-of-north-carolina/
LOCATION:LPMMC\, CNRS - Bat G\, salle Roger Maynard G-421\, Grenoble
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260226T140000
DTEND;TZID=Europe/Paris:20260226T150000
DTSTAMP:20260404T144353
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:20260302T110000
DTEND;TZID=Europe/Paris:20260302T120000
DTSTAMP:20260404T144353
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:20260302T140000
DTEND;TZID=Europe/Paris:20260302T150000
DTSTAMP:20260404T144353
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:20260305T140000
DTEND;TZID=Europe/Paris:20260305T150000
DTSTAMP:20260404T144353
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:20260404T144353
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:20260309T140000
DTEND;TZID=Europe/Paris:20260309T150000
DTSTAMP:20260404T144353
CREATED:20260213T084947Z
LAST-MODIFIED:20260213T084947Z
UID:10000063-1773064800-1773068400@sfp-alpes.fr
SUMMARY:Marek BARTKOWIAK (Paul Scherrer Institut)
DESCRIPTION:Spin-orbit control of antiferromagnetic domains without a Zeeman coupling\nRésumé : \nEncoding information in antiferromagnetic (AFM) domains is a promising solution for the ever growing demand in magnetic storage capacity. The absence of a macroscopic magnetization avoids crosstalk between different domain states\, enabling ultrahigh density spintronics while being detrimental to the domain detection and manipulation. Disentangling these merits and disadvantages seemed so far unattainable. We report evidence for a new AFM domain selection mechanism based on non Zeeman susceptibility anisotropy induced by the relative orientation of external magnetic fields to the k-domains. Consequently\, the charge transport response is controlled by the rotation of the magnetic field and a pronounced anisotropic magnetoresistance is found in the AFM phase of bulk materials Nd$_{1−x}$Ce$_x$xCoIn$_5$. Our results and the domain switching theory indicate that this constitutes a new effect which might be universal across multiband materials. It provides a novel mechanism to control and detect AFM domains\, opening new perspectives for AFM sprintronics. \nContact : andrew.fefferman@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/marek-bartkowiak-paul-scherrer-institut/
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:20260310T000000
DTEND;TZID=Europe/Paris:20260313T235959
DTSTAMP:20260404T144353
CREATED:20260324T041304Z
LAST-MODIFIED:20260124T041637Z
UID:10000032-1773100800-1773446399@sfp-alpes.fr
SUMMARY:Synergies in High Resolution Spectroscopy workshop (HIRES2026)
DESCRIPTION:The workshop will bring together researchers in the fields of neutron spin-echo\, backscattering\, and time-of-flight (TOF) spectroscopy. It aims to highlight the strengths and synergies of these techniques\, while also showcasing their interplay with other non-neutron-based methods. \nParticipation is not limited to neutron experts\, users of complementary techniques who wish to expand their research toward neutron scattering are also warmly welcome. \nAbstract submission deadline is 30 November 2025. \nFor full details please visit the website of the workshop: https://workshops.ill.fr/e/HIRES2026 \n  \nIf you have any questions don’t hesitate to contact the Organising Committee by e-mailing to hires@ill.fr \n 
URL:https://sfp-alpes.fr/event/synergies-in-high-resolution-spectroscopy-workshop-hires2026/
LOCATION:ILL – Salle de Séminaire (SB-036)\, ILL 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Workshop
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260310T083000
DTEND;TZID=Europe/Paris:20260313T120000
DTSTAMP:20260404T144353
CREATED:20260206T095155Z
LAST-MODIFIED:20260206T095155Z
UID:10000055-1773131400-1773403200@sfp-alpes.fr
SUMMARY:Synergies in High Resolution Spectroscopy workshop (HIRES2026)
DESCRIPTION:The workshop will bring together researchers in the fields of neutron spin-echo\, backscattering\, and time-of-flight (TOF) spectroscopy. It aims to highlight the strengths and synergies of these techniques\, while also showcasing their interplay with other non-neutron-based methods. \nParticipation is not limited to neutron experts\, users of complementary techniques who wish to expand their research toward neutron scattering are also warmly welcome. \nFor full details please visit the website of the workshop : https://workshops.ill.fr/e/HIRES2026 \nIf you have any questions don’t hesitate to contact the Organising Committee by e-mailing to hires@ill.fr \n_ \nContact : HIRES2026@ill.fr
URL:https://sfp-alpes.fr/event/synergies-in-high-resolution-spectroscopy-workshop-hires2026-2/
LOCATION:ILL 4\, Grenoble\, 38000\, France
CATEGORIES:Workshop
END:VEVENT
END:VCALENDAR