Current induced torques and interfacial spin-orbit coupling: Semiclassical modeling

Handle URI:
http://hdl.handle.net/10754/552865
Title:
Current induced torques and interfacial spin-orbit coupling: Semiclassical modeling
Authors:
Haney, Paul M.; Lee, Hyun-Woo; Lee, Kyung-Jin; Manchon, Aurelien ( 0000-0002-4768-293X ) ; Stiles, M. D.
Abstract:
In bilayer nanowires consisting of a ferromagnetic layer and a nonmagnetic layer with strong spin-orbit coupling, currents create torques on the magnetization beyond those found in simple ferromagnetic nanowires. The resulting magnetic dynamics appear to require torques that can be separated into two terms, dampinglike and fieldlike. The dampinglike torque is typically derived from models describing the bulk spin Hall effect and the spin transfer torque, and the fieldlike torque is typically derived from a Rashba model describing interfacial spin-orbit coupling. We derive a model based on the Boltzmann equation that unifies these approaches. We also consider an approximation to the Boltzmann equation, the drift-diffusion model, that qualitatively reproduces the behavior, but quantitatively differs in some regimes. We show that the Boltzmann equation with physically reasonable parameters can match the torques for any particular sample, but in some cases, it fails to describe the experimentally observed thickness dependencies.
KAUST Department:
Core Labs
Citation:
Current induced torques and interfacial spin-orbit coupling: Semiclassical modeling 2013, 87 (17) Physical Review B
Journal:
Physical Review B
Issue Date:
7-May-2013
DOI:
10.1103/PhysRevB.87.174411
ARXIV:
arXiv:1301.4513
Type:
Article
ISSN:
1098-0121; 1550-235X
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevB.87.174411; http://arxiv.org/abs/1301.4513
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorHaney, Paul M.en
dc.contributor.authorLee, Hyun-Wooen
dc.contributor.authorLee, Kyung-Jinen
dc.contributor.authorManchon, Aurelienen
dc.contributor.authorStiles, M. D.en
dc.date.accessioned2015-05-14T12:20:49Zen
dc.date.available2015-05-14T12:20:49Zen
dc.date.issued2013-05-07en
dc.identifier.citationCurrent induced torques and interfacial spin-orbit coupling: Semiclassical modeling 2013, 87 (17) Physical Review Ben
dc.identifier.issn1098-0121en
dc.identifier.issn1550-235Xen
dc.identifier.doi10.1103/PhysRevB.87.174411en
dc.identifier.urihttp://hdl.handle.net/10754/552865en
dc.description.abstractIn bilayer nanowires consisting of a ferromagnetic layer and a nonmagnetic layer with strong spin-orbit coupling, currents create torques on the magnetization beyond those found in simple ferromagnetic nanowires. The resulting magnetic dynamics appear to require torques that can be separated into two terms, dampinglike and fieldlike. The dampinglike torque is typically derived from models describing the bulk spin Hall effect and the spin transfer torque, and the fieldlike torque is typically derived from a Rashba model describing interfacial spin-orbit coupling. We derive a model based on the Boltzmann equation that unifies these approaches. We also consider an approximation to the Boltzmann equation, the drift-diffusion model, that qualitatively reproduces the behavior, but quantitatively differs in some regimes. We show that the Boltzmann equation with physically reasonable parameters can match the torques for any particular sample, but in some cases, it fails to describe the experimentally observed thickness dependencies.en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.87.174411en
dc.relation.urlhttp://arxiv.org/abs/1301.4513en
dc.rightsArchived with thanks to Physical Review Ben
dc.titleCurrent induced torques and interfacial spin-orbit coupling: Semiclassical modelingen
dc.typeArticleen
dc.contributor.departmentCore Labsen
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionCenter for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6202, USAen
dc.contributor.institutionPCTP and Department of Physics, Pohang University of Science and Technology, Kyungbuk 790-784, Koreaen
dc.contributor.institutionDepartment of Materials Science & Engineering, Korea University, Seoul 136-713, South Koreaen
dc.contributor.institutionKU-KIST Graduate School of Converging Science & Technology, Korea University, Seoul 136-713, Koreaen
dc.contributor.institutionUniversity of Maryland, Maryland Nanocenter, College Park, Maryland 20742, USAen
dc.identifier.arxividarXiv:1301.4513en
kaust.authorManchon, Aurelienen
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