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TZID:Europe/Paris
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260323T140000
DTEND;TZID=Europe/Paris:20260323T150000
DTSTAMP:20260404T162532
CREATED:20260306T161739Z
LAST-MODIFIED:20260306T162442Z
UID:10000098-1774274400-1774278000@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-2/
LOCATION:ILL – Salle de Séminaire (110-111)\, ILL 50 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260327T110000
DTEND;TZID=Europe/Paris:20260327T120000
DTSTAMP:20260404T162532
CREATED:20260320T095205Z
LAST-MODIFIED:20260320T095209Z
UID:10000102-1774609200-1774612800@sfp-alpes.fr
SUMMARY:Jacopo DE NARDIS (Cergy Paris University)
DESCRIPTION:Anticoncentration of Wave Functions and Information-Protected Phases in Noisy Quantum Chaotic Systems\nRésumé : \nI will present recent results on noisy quantum chaotic dynamics\, with a particular focus on wave-function anticoncentration—characterized\, for instance\, through bitstrings output distributions—and on Information-protected phases that persist at finite circuit depth. \nContact : serge.florens@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/jacopo-de-nardis-cergy-paris-university/
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:20260330T140000
DTEND;TZID=Europe/Paris:20260330T150000
DTSTAMP:20260404T162532
CREATED:20260312T152112Z
LAST-MODIFIED:20260312T152502Z
UID:10000099-1774879200-1774882800@sfp-alpes.fr
SUMMARY:Sander VAN SMAALEN (Laboratory of Crystallography\, Bayerisches Geoinstitut\, University of Bayreuth)
DESCRIPTION:Chiral charge density waves in EuAl4 and related compounds\nRésumé : \nThe BaAl 4 structure type has centrosymmetric\, tetragonal symmetry\, I4/mmm\, with three crystallographically independent atom sites: Ba\, Al1 and Al2. Solid solution series RAl 4-x Gax (R= Eu\, Sr\, Ca\, Ba; 0 < x < 4) crystallize in this structure type [1]\, where Ga preferably occupies the Al2 site. Accordingly\, complete chemical order is found for x = 0\, 2\, 4. Incommensurate charge-density waves (CDWs) have been observed in several of these ordered compounds. For the other values of x\, lack of chemical order leads to suppression of the CDW transition. At much lower temperatures (T = 10–30 K) magnetic order appears for the compounds with magnetic Eu atoms. Here\, we present the crystal structures of the incommensurate CDWs of EuAl 4 \, EuAl 2 Ga2 and SrAl 4 . In particular\, the symmetry of the CDWs is analyzed in view of x-ray diffraction data (present data [2–5])\, and results of transmission electron microscopy (TEM)\, density functional theory (DFT) calculations and inelastic x ray scattering (IXS) from the literature [6–8].\nReferences : \n[1] M. Stavinoha et al.\, Phys. Rev. B 97\, 195146 (2018). Charge density wave behavior and order-disorder in the antiferromagnetic metallic series Eu(Ga1-x Al x )4 .\n[2] S. Ramakrishnan et al.\, IUCrJ 9\, 378–385 (2022). Orthorhombic charge density wave on the tetragonal lattice of EuAl 4 .\n[3] S. R. Kotla et al.\, Phys. Rev. B 112\, 064113 (2025). Broken inversion symmetry in the charge density wave phase in EuAl 4 .\n[4] S. Ramakrishnan et al.\, Phys. Rev. Research 6\, 023277 (2024). Non-centrosymmetric\, transverse structural modulation in SrAl 4 \, and elucidation of its origin in the BaAl 4 family of\ncompounds.\n[5] H. Agarwal et al.\, Phys. Rev. B 111\, 155144 (2025). I-centered versus F-centered orthorhombic symmetry and negative thermal expansion of the charge density wave of EuAl2 Ga2 .\n[6] H. Ni et al.\, Phys. Rev. Mater. 8\, 104414 (2024). Real-space visualization of atomic displacements in a long-wavelength charge density wave using cryogenic 4D-STEM.\n[7] A. N. Korshunov et al.\, Phys. Rev. B 110\, 045102 (2024). Phonon softening and atomic modulations in EuAl 4 .\n[8] F. Z. Yang et al.\, Nature Commun. 16\, 10401 (2025). Incommensurate Transverse Peierls Transition and Signature of Chiral Charge Density Wave in EuAl4 \nContact : andrew.fefferman@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/sander-van-smaalen-laboratory-of-crystallography-bayerisches-geoinstitut-university-of-bayreuth/
LOCATION:CNRS – Salle Louis Weil (E424)\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
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DTSTART;TZID=Europe/Paris:20260331T140000
DTEND;TZID=Europe/Paris:20260331T150000
DTSTAMP:20260404T162532
CREATED:20260227T152048Z
LAST-MODIFIED:20260227T152234Z
UID:10000088-1774965600-1774969200@sfp-alpes.fr
SUMMARY:Simon PONTON (chargé de recherche CNRS - SIMaP)
DESCRIPTION:Development of the combinatorial approach for the CVD thin film deposition process : Multiphysics coupling and machine learning\nRésumé : \nThe combinatorial approach applied to chemical vapor deposition processes integrating high-throughput experiments\, computational simulations\, and machine learning seems to emerge as a transformative paradigm to accelerate the discovery of novel materials. Through systematic gradient explorations\, large-scale datasets can be generated to deepen our understanding of process-structure-property relationships. Machine learning models\, trained on experimental and simulated data enable rapid prediction and identification of high-potential solutions\, thereby guiding future experiments and simulations. The synergy not only reduces the time or cost associated with material discovery but also unlocks access to previously unexplored regions of the materials space. \nShort Bio/CVMy academic journey began in Grenoble\, where I studied chemistry before developing a keen interest in materials sciences\, particularly nanostructures and their processing. Driven by a desire to unravel the underlying mechanisms\, I started my PhD in Toulouse\, between the CIRIMAT and LGC. There\, I expanded my expertise in chemical engineering and Multiphysics simulation. After nearly two years of postdoctoral research\, I sought to broaden my research perspective and joined Polytechnique Montréal in the chemical engineering section for two postdoctoral positions that led to an associate professor role. However\, my longing for French cheese proved irresistible\, I successfully secured a position at CNRS and joined SIMaP in February 2026. \nContact : deborah.verger@grenoble-inp.fr
URL:https://sfp-alpes.fr/event/simon-ponton-charge-de-recherche-cnrs-simap/
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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DTSTART;TZID=Europe/Paris:20260401T140000
DTEND;TZID=Europe/Paris:20260401T160000
DTSTAMP:20260404T162532
CREATED:20260227T150400Z
LAST-MODIFIED:20260227T151333Z
UID:10000087-1775052000-1775059200@sfp-alpes.fr
SUMMARY:Soutenance de Thèse de Simon VERNIER
DESCRIPTION:Optimisation et caractérisation avancée de couches minces de zircone stabilisée à l’yttrine par dépôt chimique d’organométalliques en phase vapeur pour des cellules électrochimiques à oxydes solides\nRésumé : \nNotre consommation énergétique et l’électrification de notre production afin de la décarboner. Le développement des énergies solaire et éolienne est cependant freiné par leur défaut principal : leur intermittence. Le stockage saisonnier de l’énergie sous forme d’hydrogène est une solution prometteuse pour pallier à ce défaut. EPISTORE est un projet de recherche européen visant au développement d’une cellule électrochimique à oxydes solides (SOC)\, réversible\, en couche mince\, basse température (< 500°C). Ces dispositifs sont en effet particulièrement pertinents pour la conversion électricité-gaz. \nCette thèse\, dans le cadre d’EPISTORE\, projet du programme de recherche et d’innovation Horizon 2020\, vise au développement de couches minces de zircone stabilisée à l’yttrine (YSZ) pour servir d’électrolyte pour ces SOCs. Le YSZ\, contenant 8 mol% d’yttrine (8YSZ) est un matériau déjà largement utilisé comme électrolyte dans les dispositifs électrochimiques en céramique. Ses propriétés lui permettent de conduire efficacement les ions oxygènes tout en formant une barrière électronique. L’étude des couches minces de YSZ fabriquées au cours de cette thèse doit permettre d’évaluer la pertinence de réduire la quantité d’yttrine dans le matériau. En effet\, les travaux publiés sur le sujet suggèrent qu’une concentration de 3 mol% ou 4 mol% d’yttrine pourraient améliorer les propriétés mécaniques\, vitales pour des dispositifs en couches minces. \nCe travail détaille l’optimisation de la synthèse de ces films par dépôt chimique en phase vapeurs d’organométalliques (MOCVD) puis la caractérisation avancée de ces échantillons\, non seulement structurellement et morphologiquement (XRD\, TEM\, SEM\, Raman…) mais aussi de leurs propriétés électriques via de la spectroscopie d’impédance électrochimique (EIS) ou mécaniques via nanoindentation et tests de déformation. Une nouvelle technique d’observation directe de la diffusion ionique impliquant des traceurs isotopiques et de la spectroscopie Raman a aussi été adaptée à ce matériau pour la première fois. \nLes résultats obtenus suggèrent que l’emploi de 3YSZ et 4YSZ à basse température (< 500 °C) permettent d’obtenir des performances électrochimiques équivalentes ou supérieures au 8YSZ. Un effet positif de ce changement de concentration sur les propriétés mécaniques des films n’a cependant pas été démontré. \nContact : deborah.verger@grenoble-inp.fr
URL:https://sfp-alpes.fr/event/soutenance-de-these-de-simon-vernier/
LOCATION:Phelma minatec\, Salle Z108\, Grenoble INP - Phelma\, 3 parvis Louis Néel\, Grenoble\, 38000\, France
CATEGORIES:Soutenance,Soutenance de Thèse
ORGANIZER;CN="LMGP":MAILTO:deborah.verger@grenoble-inp.fr
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