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 $\alpha$ 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

References in corpus (4)

• Spin and Spin-Wave Dynamics in Josephson Junctions
• Dynamics of localized spins coupled to the conduction electrons with charge/spin currents
• Output spectrum of a measuring device at arbitrary voltage and temperature
• Nondemolition measurements of a single quantum spin using Josephson oscillations

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