Bulletin of the American Physical Society
2024 APS March Meeting
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session S24: Recent Advances in Spin Textures and Dynamics in Topological Magnets
8:00 AM–11:00 AM,
Thursday, March 7, 2024
Room: 101DE
Sponsoring
Unit:
GMAG
Chair: Shizeng Lin, Los Alamos National Laboratory
Abstract: S24.00003 : Topological spin textures in centrosymmetric/van der Waals magnets*
9:12 AM–9:48 AM
Presenter:
Shinichiro Seki
(University of Tokyo)
Author:
Shinichiro Seki
(University of Tokyo)
In this talk, I overview the recent experimental discovery of skyrmions in centrosymmetric systems. In particular, we focus on the case of centrosymmetric tetragonal magnets, where the square lattice of skyrmions with extremely small diameter (1.9 nm for GdRu2Si2, i.e. the smallest value ever reported for single-component bulk materials[1]) has been observed. This class of materials (such as GdRu2Ge2[2] and EuAl4[3]) often host multi-step toplotical transitions among a rich variety of skyrmion and meron crystal states, whose origin can be ascribed to the competition of RKKY interactions at inequivalent wave vectors. Non-coplanar topological spin texture has also been identified in a series of intercalated van der Waals magnets (CoTa3S6 and CoNb3S6)[4], and their nontrivial electron trasport properties are investigated.
*This work was partly supported by Grants-In-Aid for Scientific Research (grant nos 18H03685, 20H00349, 21H04440, 21H04990, 21K13876, 21K18595, 22H04965, 22H04468) from JSPS, PRESTO (grant nos JPMJPR18L5, JPMJPR20B4, JPMJPR20L8) and CREST (grant no. JPMJCR1874) from JST, Katsu Research Encouragement Award and UTEC-UTokyo FSI Research Grant Program of the University of Tokyo, Asahi Glass Foundation and Murata Science Foundation.
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