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Title: Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet

Abstract

The spin Hall effect (SHE)1,2,3,4,5 achieves coupling between charge currents and collective spin dynamics in magnetically ordered systems and is a key element of modern spintronics6,7,8,9. However, previous research has focused mainly on non-magnetic materials, so the magnetic contribution to the SHE is not well understood. Here we show that antiferromagnets have richer spin Hall properties than do non-magnetic materials. We find that in the non-collinear antiferromagnet10 Mn3Sn, the SHE has an anomalous sign change when its triangularly ordered moments switch orientation. We observe contributions to the SHE (which we call the magnetic SHE) and the inverse SHE (the magnetic inverse SHE) that are absent in non-magnetic materials and that can be dominant in some magnetic materials, including antiferromagnets. We attribute the dominance of this magnetic mechanism in Mn3Sn to the momentum-dependent spin splitting that is produced by non-collinear magnetic order. This discovery expands the horizons of antiferromagnet spintronics and spin–charge coupling mechanisms.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Riverside, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1566623
DOE Contract Number:  
SC0012670
Resource Type:
Journal Article
Journal Name:
Nature (London)
Additional Journal Information:
Journal Volume: 565; Journal Issue: 7741; Journal ID: ISSN 0028-0836
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
phonons, thermal conductivity, thermoelectric, spin dynamics, spintronics

Citation Formats

Kimata, Motoi, Chen, Hua, Kondou, Kouta, Sugimoto, Satoshi, Muduli, Prasanta K., Ikhlas, Muhammad, Omori, Yasutomo, Tomita, Takahiro, MacDonald, Allan. H., Nakatsuji, Satoru, and Otani, Yoshichika. Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet. United States: N. p., 2019. Web. doi:10.1038/s41586-018-0853-0.
Kimata, Motoi, Chen, Hua, Kondou, Kouta, Sugimoto, Satoshi, Muduli, Prasanta K., Ikhlas, Muhammad, Omori, Yasutomo, Tomita, Takahiro, MacDonald, Allan. H., Nakatsuji, Satoru, & Otani, Yoshichika. Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet. United States. doi:10.1038/s41586-018-0853-0.
Kimata, Motoi, Chen, Hua, Kondou, Kouta, Sugimoto, Satoshi, Muduli, Prasanta K., Ikhlas, Muhammad, Omori, Yasutomo, Tomita, Takahiro, MacDonald, Allan. H., Nakatsuji, Satoru, and Otani, Yoshichika. Tue . "Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet". United States. doi:10.1038/s41586-018-0853-0.
@article{osti_1566623,
title = {Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet},
author = {Kimata, Motoi and Chen, Hua and Kondou, Kouta and Sugimoto, Satoshi and Muduli, Prasanta K. and Ikhlas, Muhammad and Omori, Yasutomo and Tomita, Takahiro and MacDonald, Allan. H. and Nakatsuji, Satoru and Otani, Yoshichika},
abstractNote = {The spin Hall effect (SHE)1,2,3,4,5 achieves coupling between charge currents and collective spin dynamics in magnetically ordered systems and is a key element of modern spintronics6,7,8,9. However, previous research has focused mainly on non-magnetic materials, so the magnetic contribution to the SHE is not well understood. Here we show that antiferromagnets have richer spin Hall properties than do non-magnetic materials. We find that in the non-collinear antiferromagnet10 Mn3Sn, the SHE has an anomalous sign change when its triangularly ordered moments switch orientation. We observe contributions to the SHE (which we call the magnetic SHE) and the inverse SHE (the magnetic inverse SHE) that are absent in non-magnetic materials and that can be dominant in some magnetic materials, including antiferromagnets. We attribute the dominance of this magnetic mechanism in Mn3Sn to the momentum-dependent spin splitting that is produced by non-collinear magnetic order. This discovery expands the horizons of antiferromagnet spintronics and spin–charge coupling mechanisms.},
doi = {10.1038/s41586-018-0853-0},
journal = {Nature (London)},
issn = {0028-0836},
number = 7741,
volume = 565,
place = {United States},
year = {2019},
month = {1}
}

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