Please use this identifier to cite or link to this item:
http://elar.urfu.ru/handle/10995/101735
Title: | Spin-torque resonance due to diffusive dynamics at the surface of a topological insulator |
Authors: | Sokolewicz, R. J. Ado, I. A. Katsnelson, M. I. Ostrovsky, P. M. Titov, M. |
Issue Date: | 2019 |
Publisher: | American Physical Society |
Citation: | Spin-torque resonance due to diffusive dynamics at the surface of a topological insulator / R. J. Sokolewicz, I. A. Ado, M. I. Katsnelson, et al. — DOI 10.1103/PhysRevB.99.214444 // Physical Review B. — 2019. — Vol. 99. — Iss. 21. — 214444. |
Abstract: | We investigate spin-orbit torques on magnetization in an insulating ferromagnetic layer that is brought into close proximity to a topological insulator (TI). In addition to the well-known fieldlike spin-orbit torque, we identify an anisotropic anti-damping-like spin-orbit torque that originates in a diffusive motion of conduction electrons. This diffusive torque is vanishing in the limit of zero momentum (i.e., for a spatially homogeneous electric field or current), but it may, nevertheless, have a strong impact on spin-torque resonance at finite frequency provided the external field is neither parallel nor perpendicular to the TI surface. The required electric-field configuration can be created by a grated top gate. ©2019 American Physical Society. |
Keywords: | ELECTRIC FIELDS ELECTRIC INSULATORS FIELD EFFECT TRANSISTORS TOPOLOGICAL INSULATORS TORQUE CLOSE PROXIMITY CONDUCTION ELECTRONS DIFFUSIVE DYNAMICS DIFFUSIVE MOTIONS EXTERNAL FIELDS FERROMAGNETIC LAYERS FINITE FREQUENCIES SPATIALLY HOMOGENEOUS SPIN DYNAMICS |
URI: | http://elar.urfu.ru/handle/10995/101735 |
Access: | info:eu-repo/semantics/openAccess |
SCOPUS ID: | 85068618003 |
WOS ID: | 000473134500005 |
PURE ID: | 56d38379-9e2e-4491-8d1b-aa06d00ff219 10283980 |
ISSN: | 24699950 |
DOI: | 10.1103/PhysRevB.99.214444 |
Appears in Collections: | Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
2-s2.0-85068618003.pdf | 794,62 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.