Intrinsic spin torque without spin-orbit coupling

Kyoung Whan Kim, Kyoung Jin Lee, Hyun Woo Lee, M. D. Stiles

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We derive an intrinsic contribution to the nonadiabatic spin torque for nonuniform magnetic textures. It differs from previously considered contributions in several ways and can be the dominant contribution in some models. It does not depend on the change in occupation of the electron states due to the current flow but rather is due to the perturbation of the electronic states when an electric field is applied. Therefore it should be viewed as electric-field-induced rather than current-induced. Unlike previously reported nonadiabatic spin torques, it does not originate from extrinsic relaxation mechanisms or spin-orbit coupling. This intrinsic nonadiabatic spin torque is related by a chiral connection to the intrinsic spin-orbit torque that has been calculated from the Berry phase for Rashba systems.

Original languageEnglish
Article number224426
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number22
DOIs
Publication statusPublished - 2015 Dec 21

Fingerprint

torque
Orbits
Torque
orbits
Electric fields
Induced currents
Electronic states
electric fields
Electron energy levels
electron states
Textures
occupation
textures
perturbation
electronics

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Intrinsic spin torque without spin-orbit coupling. / Kim, Kyoung Whan; Lee, Kyoung Jin; Lee, Hyun Woo; Stiles, M. D.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 92, No. 22, 224426, 21.12.2015.

Research output: Contribution to journalArticle

@article{999793a961e24a93b21ad4ae99d6ac52,
title = "Intrinsic spin torque without spin-orbit coupling",
abstract = "We derive an intrinsic contribution to the nonadiabatic spin torque for nonuniform magnetic textures. It differs from previously considered contributions in several ways and can be the dominant contribution in some models. It does not depend on the change in occupation of the electron states due to the current flow but rather is due to the perturbation of the electronic states when an electric field is applied. Therefore it should be viewed as electric-field-induced rather than current-induced. Unlike previously reported nonadiabatic spin torques, it does not originate from extrinsic relaxation mechanisms or spin-orbit coupling. This intrinsic nonadiabatic spin torque is related by a chiral connection to the intrinsic spin-orbit torque that has been calculated from the Berry phase for Rashba systems.",
author = "Kim, {Kyoung Whan} and Lee, {Kyoung Jin} and Lee, {Hyun Woo} and Stiles, {M. D.}",
year = "2015",
month = "12",
day = "21",
doi = "10.1103/PhysRevB.92.224426",
language = "English",
volume = "92",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Institute of Physics Publising LLC",
number = "22",

}

TY - JOUR

T1 - Intrinsic spin torque without spin-orbit coupling

AU - Kim, Kyoung Whan

AU - Lee, Kyoung Jin

AU - Lee, Hyun Woo

AU - Stiles, M. D.

PY - 2015/12/21

Y1 - 2015/12/21

N2 - We derive an intrinsic contribution to the nonadiabatic spin torque for nonuniform magnetic textures. It differs from previously considered contributions in several ways and can be the dominant contribution in some models. It does not depend on the change in occupation of the electron states due to the current flow but rather is due to the perturbation of the electronic states when an electric field is applied. Therefore it should be viewed as electric-field-induced rather than current-induced. Unlike previously reported nonadiabatic spin torques, it does not originate from extrinsic relaxation mechanisms or spin-orbit coupling. This intrinsic nonadiabatic spin torque is related by a chiral connection to the intrinsic spin-orbit torque that has been calculated from the Berry phase for Rashba systems.

AB - We derive an intrinsic contribution to the nonadiabatic spin torque for nonuniform magnetic textures. It differs from previously considered contributions in several ways and can be the dominant contribution in some models. It does not depend on the change in occupation of the electron states due to the current flow but rather is due to the perturbation of the electronic states when an electric field is applied. Therefore it should be viewed as electric-field-induced rather than current-induced. Unlike previously reported nonadiabatic spin torques, it does not originate from extrinsic relaxation mechanisms or spin-orbit coupling. This intrinsic nonadiabatic spin torque is related by a chiral connection to the intrinsic spin-orbit torque that has been calculated from the Berry phase for Rashba systems.

UR - http://www.scopus.com/inward/record.url?scp=84953736024&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84953736024&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.92.224426

DO - 10.1103/PhysRevB.92.224426

M3 - Article

AN - SCOPUS:84953736024

VL - 92

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 22

M1 - 224426

ER -