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Spin Current$
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Sadamichi Maekawa, Sergio O. Valenzuela, Eiji Saitoh, and Takashi Kimura

Print publication date: 2017

Print ISBN-13: 9780198787075

Published to Oxford Scholarship Online: December 2017

DOI: 10.1093/oso/9780198787075.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 06 December 2021

Theory of Rashba Torques

Theory of Rashba Torques

Chapter:
(p.475) 24 Theory of Rashba Torques
Source:
Spin Current
Author(s):

A. Manchon

S. Zhang

Publisher:
Oxford University Press
DOI:10.1093/oso/9780198787075.003.0024

This chapter focuses on the theory of current-driven Rashba torque, a special type of spin–orbit mediated spin torque that requires broken spatial-inversion symmetry. This specific form of spin-orbit interaction enables the electrical generation of a non-equilibrium spin density that yields both damping-like and field-like torques on the local magnetic moments. We review the recent results obtained in (ferromagnetic and antiferromagnetic) two-dimensional electron gases, bulk magnetic semiconductors, and at the surface of topological insulators. We conclude by summarizing recent experimental results that support the emergence of Rashba torques in magnets lacking inversion symmetry.

Keywords:   spin-orbit interaction, rashba field, spatial-inversion symmetry, semiconductor quantum wells, gate voltage, intrinsic band mismatch, topological insulators

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