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X-ORIGINAL-URL:https://laboratoire-albert-fert.cnrs-thales.fr/
X-WR-CALNAME:Laboratoire Albert Fert
X-WR-CALDESC:CNRS - Thales
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UID:MEC-6832a7b24bc06775d02b7406880b93fc@laboratoire-albert-fert.cnrs-thales.fr
DTSTART:20250605T120000Z
DTEND:20250605T130000Z
DTSTAMP:20250528T163700Z
CREATED:20250528
LAST-MODIFIED:20250528
PRIORITY:5
SEQUENCE:3
TRANSP:OPAQUE
SUMMARY:Seminar – Takeo Kato
DESCRIPTION: Takeo Kato (Institute for Solid State Physics, University of Tokyo) will give a seminar on  June 5th 2025 at the TRT Thales auditorium.\nTitle: \nSpin-Chiral Phonon Conversion in Nonmagnetic Metal-Chiral Insulator Junctions\nAbstract:\nRecently, phonon-spin interconversion phenomena have attracted considerable attention as manifestations related to chirality-induced spin selectivity (CISS). Despite numerous investigations [1], the microscopic mechanism governing the interconversion between chiral phonons and electron spins remains unresolved. In this study [2], we develop a theoretical framework for this interconversion by considering the gyromagnetic effect. We analyze a junction system composed of a nonmagnetic metal and a chiral insulator and derive a spin-microscopic rotation coupling at the interface. We demonstrate that a non-equilibrium distribution of chiral phonon modes, induced by a temperature gradient, can generate a spin current across the junction, in consistent with the recent experiment [3]. We also mention extension of this theoretical framework to CISS effect in DNA [4].\nReferences :\n[1] Y. Togawa et al., J. Phys. Soc. Jpn. 92 (2023) 081006.\n[2] T. Funato, M. Matsuo, and T. Kato, Phys. Rev. Lett. 132, 236201 (2024).\n[3] K. Ohe, et al., Phys. Rev. Lett. 132, 056302 (2024).\n[4] R. Sano and T. Kato, preprint (arXiv:2404.19000).\n
URL:https://laboratoire-albert-fert.cnrs-thales.fr/en/events/seminar-takeo-kato/
CATEGORIES:Seminars
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