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Controlling chiral magnetism: From molecular and optical manipulation of skyrmions to collective dynamics and AI

日程 : 2026年11月20日(金) 3:00 pm - 4:00 pm 場所 : 物性研究所本館6階 第2セミナー室 (A612) 講師 : Theo BALLAND 所属 : Mathias Kläui Group, Johannes Gutenberg University Mainz, Germany 世話人 : 三輪 真嗣 (ex. 63300)
e-mail: miwa@issp.u-tokyo.ac.jp
講演言語 : 英語

Chiral magnetic textures offer a versatile platform for exploring how molecular chirality, light, and collective interactions govern magnetic behavior. In this talk, I will present our studies of chiral polypeptides exhibiting chirality-induced spin selectivity (CISS) coupled to ferromagnetic thin films hosting magnetic skyrmions. I will discuss how molecular helicity modifies magnetization switching and skyrmion dynamics [1,2], and examine topological-defect dynamics and ordering in confined skyrmion lattices in the context of two-dimensional phase transitions [3]. I will also present a study of all-optical helicity independent switching of skyrmionic spin textures [4] and outline prospects for investigating helicity-dependent light-matter interactions. Finally, I will discuss how recently agentic artificial intelligence developed in our lab can automate and optimize real-time Kerr microscopy experiments, enabling more efficient experimental exploration of magnetic phenomena.
[1] T. Balland et al., arXiv:2610.12145 (under review)
[2] Y. Kapon et al., Nano Lett. 25, 306–312 (2025).
[3] R. Gruber et al., Nat. Nanotechnol. 20, 1405–1411 (2025).
[4] E. Mangini et al., arXiv:2610.01568 (under review)


(公開日: 2026年11月02日)