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

被引：341

作者：

Kimata, Motoi ^{[1
,2
,5
]}

Chen, Hua ^{[3
,6
]}

Kondou, Kouta ^{[2
,4
]}

Sugimoto, Satoshi ^{[1
,7
]}

Muduli, Prasanta K. ^{[1
]}

Ikhlas, Muhammad ^{[1
]}

Omori, Yasutomo ^{[1
]}

Tomita, Takahiro ^{[1
,2
]}

MacDonald, Allan H. ^{[3
]}

Nakatsuji, Satoru ^{[1
,2
]}

Otani, Yoshichika ^{[1
,2
,4
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba, Japan

[2] Japan Sci & Technol Agcy JST, CREST, Saitama, Japan

[3] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

[4] RIKEN, Ctr Emergent Matter Sci, Wako, Saitama, Japan

[5] Tohoku Univ, Inst Mat Res, Sendai, Miyagi, Japan

[6] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA

[7] Natl Inst Mat Sci, Tsukuba, Ibaraki, Japan

来源：

NATURE | 2019年 / 565卷 / 7741期

基金：

日本科学技术振兴机构;

关键词：

D O I：

10.1038/s41586-018-0853-0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The spin Hall effect (SHE)(1-5) achieves coupling between charge currents and collective spin dynamics in magnetically ordered systems and is a key element of modern spintronics(6-9). 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 antiferromagnet(10) 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.

引用

页码：627 / +

页数：15

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