Anisotropy of spin-transfer torques and Gilbert damping induced by Rashba coupling

被引：9

作者：

Ado, I. A. ^{[1
]}

Ostrovsky, P. M. ^{[2
,3
]}

Titov, M. ^{[1
,4
]}

机构：

[1] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 AJ Nijmegen, Netherlands

[2] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[3] RAS, LD Landau Inst Theoret Phys, Moscow 119334, Russia

[4] ITMO Univ, St Petersburg 197101, Russia

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 08期

基金：

俄罗斯科学基金会;

关键词：

DOMAIN-WALL MOTION; MAGNETIZATION DYNAMICS; CONDUCTION ELECTRONS; DRIVEN; EMERGENCE;

D O I：

10.1103/PhysRevB.101.085405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin-transfer torques (STT), Gilbert damping (GD), and effective spin renormalization (ESR) are investigated microscopically in a two-dimensional Rashba ferromagnet with spin-independent Gaussian white-noise disorder. Rashba spin-orbit coupling-induced anisotropy of these phenomena is thoroughly analyzed. For the case of two partly filled spin subbands, a remarkable relation between the anisotropic STT, GD, and ESR is established. In the absence of magnetic field and other torques on magnetization, this relation corresponds to a current-induced motion of a magnetic texture with the classical drift velocity of conduction electrons. Finally, we compute spin susceptibility of the system and generalize the notion of spin-polarized current.

引用

页数：18

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