Voltage dependence of Landau-Lifshitz-Gilbert damping of a spin in a current driven tunnel junction
Abstract
We present a theory of Landau-Lifshitz-Gilbert damping α for a localized spin 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.
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