Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session D19: Topological Spintronics using Chiral Antiferromagnets
2:30 PM–5:30 PM,
Monday, March 2, 2020
Room: 207
Sponsoring
Unit:
GMAG
Chair: Collin Broholm, Johns Hopkins University
Abstract: D19.00003 : Magnetic Spin Hall Effect of a Topological Chiral Antiferromagnet Mn3Sn*
Presenter:
Yoshichika Otani
(ISSP, Univ of Tokyo)
Author:
Yoshichika Otani
(ISSP, Univ of Tokyo)
Our SHE experiments showed that the non-collinear antiferromagnet Mn3Sn has richer spin Hall properties than non-magnetic materials, that is, the SHE has an unusual sign change when its triangularly ordered moments switch orientation. Our observations demonstrate that a novel type of contribution to the SHE (magnetic SHE) and the inverse SHE (MISHE) can be dominant in some magnetic materials, including antiferromagnets. We attribute this magnetic mechanism in Mn3Sn to the momentum-dependent spin splitting produced by the non-collinear magnetic order [4]. This discovery further expands the horizons of antiferromagnet spintronics and motivates a universal outlook on spin-charge coupling mechanisms in spintronics.
[1] S. Nakatsuji, N. Kiyohara, and T. Higo, Nature 527, 212–215 (2015).
[2] J. Kuebler, and C. Felser, EPL 108, 67001 (2014).
[3] K. Kuroda et al. Nat Mater. 16, 1090 (2017)
[4] M. Kimata et al. Nature 565, 627 (2019).
*This work was supported by a Grant-in-Aid for Scientific Research on Innovative Area, “Nano Spin Conversion Science” (Grant No. 26103002) and CREST(JPMJCR15Q5).
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