Intrinsic Spin and Orbital Hall Effects from Orbital Texture

被引：276

作者：

Go, Dongwook ^{[1
]}

Jo, Daegeun ^{[1
]}

Kim, Changyoung ^{[2
,3
]}

Lee, Hyun-Woo ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Phys, Pohang 37673, South Korea

[2] Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea

[3] Inst for Basic Sci Korea, Ctr Correlated Electron Syst, Seoul 08826, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

Crystal symmetry - Platinum compounds - Degrees of freedom (mechanics) - Textures;

D O I：

10.1103/PhysRevLett.121.086602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show theoretically that both the intrinsic spin Hall effect (SHE) and orbital Hall effect (OHE) can arise in centrosymmetric systems through momentum-space orbital texture, which is ubiquitous even in centrosymmetric systems unlike spin texture. The OHE occurs even without spin-orbit coupling (SOC) and is converted into the SHE through SOC. The resulting spin Hall conductivity is large (comparable to that of Pt) but depends on the SOC strength in a nonmonotonic way. This mechanism is stable against orbital quenching. This work suggests a path for an ongoing search for materials with stronger SHE. It also calls for experimental efforts to probe orbital degrees of freedom in the OHE and SHE. Possible ways for experimental detection are briefly discussed.

引用

页数：6

共 48 条

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