| Author | dc.contributor.author | Núñez Vásquez, Álvaro | |
| Author | dc.contributor.author | Duine, R.A. | es_CL |
| Admission date | dc.date.accessioned | 2010-01-06T21:06:16Z | |
| Available date | dc.date.available | 2010-01-06T21:06:16Z | |
| Publication date | dc.date.issued | 2008-02 | |
| Cita de ítem | dc.identifier.citation | PHYSICAL REVIEW B, Volume: 77, Issue: 5, Article Number: 054401, 2008 | en_US |
| Identifier | dc.identifier.issn | 1098-0121 | |
| Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/125051 | |
| Abstract | dc.description.abstract | Starting from a model that consists of a semiclassical spin coupled to two leads we present a
microscopic derivation of the Langevin equation for the direction of the spin. For slowly-changing
direction it takes on the form of the stochastic Landau-Lifschitz-Gilbert equation. We give expressions
for the Gilbert damping parameter and the strength of the fluctuations, including their
bias-voltage dependence. At nonzero bias-voltage the fluctuations and damping are not related by
the fluctuation-dissipation theorem. We find, however, that in the low-frequency limit it is possible
to introduce a voltage-dependent effective temperature that characterizes the fluctuations in the
direction of the spin, and its transport-steady-state probability distribution function. | en_US |
| Patrocinador | dc.description.sponsorship | This work was supported in
part by the National Science Foundation under grants
DMR-0606489, DMR-0210383, and PHY99-07949. ASN
is partially funded by Proyecto Fondecyt de Iniciacion
11070008 and Proyecto Bicentenario de Ciencia y Tecnolog
´ıa, ACT027. | en_US |
| Lenguage | dc.language.iso | en | en_US |
| Publisher | dc.publisher | AMER PHYSICAL SOC | en_US |
| Keywords | dc.subject | DOMAIN-WALL MOTION | en_US |
| Título | dc.title | Effective temperature and Gilbert damping of a current-driven localized spin | en_US |
| Document type | dc.type | Artículo de revista | |
