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

0485119 - FZÚ 2018 RIV US eng J - Journal Article
Kim, K.W. - Lee, K.J. - Sinova, Jairo - Lee, H. W. - Stiles, M.D.
Spin-orbit torques from interfacial spin-orbit coupling for various interfaces.
Physical Review B. Roč. 96, č. 10 (2017), s. 1-23, č. článku 104438. ISSN 2469-9950. E-ISSN 2469-9969
EU Projects: European Commission(XE) 610115 - SC2
Institutional support: RVO:68378271
Keywords : topological insulator * domain-walls * magnitude * transport * systems
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.813, year: 2017

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.
Permanent Link: http://hdl.handle.net/11104/0280206