Spin-orbit torques from interfacial spin-orbit coupling for various interfaces

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

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We use a perturbative approach to study the effects of interfacial spin-orbit coupling in magnetic multilayers by treating the two-dimensional Rashba model in a fully three-dimensional description of electron transport near an interface. This formalism provides a compact analytic expression for current-induced spin-orbit torques in terms of unperturbed scattering coefficients, allowing computation of spin-orbit torques for various contexts, by simply substituting scattering coefficients into the formulas. It applies to calculations of spin-orbit torques for magnetic bilayers with bulk magnetism, those with interface magnetism, a normal-metal/ferromagnetic insulator junction, and a topological insulator/ferromagnet junction. It predicts a dampinglike component of spin-orbit torque that is distinct from any intrinsic contribution or those that arise from particular spin relaxation mechanisms. We discuss the effects of proximity-induced magnetism and insertion of an additional layer and provide formulas for in-plane current, which is induced by a perpendicular bias, anisotropic magnetoresistance, and spin memory loss in the same formalism.

Original languageEnglish
Article number104438
JournalPhysical Review B
Volume96
Issue number10
DOIs
Publication statusPublished - 2017 Sep 26

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torque
Orbits
Torque
orbits
Magnetism
scattering coefficients
Magnetic multilayers
Enhanced magnetoresistance
Scattering
Ferromagnetic materials
Induced currents
insulators
formalism
two dimensional models
Data storage equipment
proximity
insertion
metals
electrons

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Spin-orbit torques from interfacial spin-orbit coupling for various interfaces. / Kim, Kyoung Whan; Lee, Kyoung Jin; Sinova, Jairo; Lee, Hyun Woo; Stiles, M. D.

In: Physical Review B, Vol. 96, No. 10, 104438, 26.09.2017.

Research output: Contribution to journalArticle

Kim, Kyoung Whan ; Lee, Kyoung Jin ; Sinova, Jairo ; Lee, Hyun Woo ; Stiles, M. D. / Spin-orbit torques from interfacial spin-orbit coupling for various interfaces. In: Physical Review B. 2017 ; Vol. 96, No. 10.
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