Voltage dependence of Landau-Lifshitz-Gilbert damping of a spin in a current driven tunnel junction

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We present a theory of Landau-Lifshitz-Gilbert damping $α$ for a localized spin ${\vec S}$ in the junction coupled to the conduction electrons in both leads under an applied volatege $V$. We find the voltage dependence of the damping term reflecting the energy dependence of the density of states. We find the effect is linear in the voltage and cotrolled by particle-hole asymmetry of the leads.
6 pages, 3 figures

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Mesoscale and Nanoscale Physics, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/106967

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0601185
 http://arxiv.org/abs/cond-mat/0601185
 Phys. Rev. B 73, 212501(2006)
 doi:10.1103/PhysRevB.73.212501

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