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arXiv · 0804.0820

Inhomogeneous Gilbert damping from impurities and electron-electron interactions

E. M. Hankiewicz·G. Vignale·Y. Tserkovnyak
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Abstract

We present a unified theory of magnetic damping in itinerant electron ferromagnets at order $q^2$ including electron-electron interactions and disorder scattering. We show that the Gilbert damping coefficient can be expressed in terms of the spin conductivity, leading to a Matthiessen-type formula in which disorder and interaction contributions are additive. In a weak ferromagnet regime, electron-electron interactions lead to a strong enhancement of the Gilbert damping.

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E. M. Hankiewicz, G. Vignale, Y. Tserkovnyak. 2008-08-09. Inhomogeneous Gilbert damping from impurities and electron-electron interactions. https://doi.org/10.1103/physrevb.78.020404

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