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

Hosho Katsura·Alexander V. Balatsky·Zohar Nussinov·Naoto Nagaosa
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Abstract

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.

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Hosho Katsura, Alexander V. Balatsky, Zohar Nussinov, Naoto Nagaosa. 2006-01-10. Voltage dependence of Landau-Lifshitz-Gilbert damping of a spin in a current driven tunnel junction. https://doi.org/10.1103/physrevb.73.212501

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