Spin Currents Induced by Nonuniform Rashba-Type Spin-Orbit Field
| Autor: | Kazuhiro Tsutsui, Gen Tatara, Shuichi Murakami, Akihito Takeuchi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Physics
Condensed Matter - Materials Science Condensed matter physics Spintronics Condensed Matter - Mesoscale and Nanoscale Physics General Physics and Astronomy Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Spin–orbit interaction Spin current Formalism (philosophy of mathematics) Ferromagnetism Mesoscale and Nanoscale Physics (cond-mat.mes-hall) External field Torque Condensed Matter::Strongly Correlated Electrons Astrophysics::Earth and Planetary Astrophysics Spin relaxation |
| Popis: | We study the spin relaxation torque in nonmagnetic or ferromagnetic metals with nonuniform spin-orbit coupling within the Keldysh Green's function formalism. In non-magnet, the relaxation torque is shown to arise when the spin-orbit coupling is not uniform. In the absence of an external field, the spin current induced by the relaxation torque is proportional to the vector chirality of Rashba-type spin-orbit field (RSOF). In the presence of an external field, on the other hand, spin relaxation torque arises from the coupling of the external field and vector chirality of RSOF. Our result indicates that spin-sink or source effects are controlled by designing RSOF in junctions. 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|