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arXiv · 0710.5193

Electron Transport Driven by Nonequilibrium Magnetic Textures

Yaroslav Tserkovnyak·Matthew Mecklenburg
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Abstract

Spin-polarized electron transport driven by inhomogeneous magnetic dynamics is discussed in the limit of a large exchange coupling. Electron spins rigidly following the time-dependent magnetic profile experience spin-dependent fictitious electric and magnetic fields. We show that the electric field acquires important corrections due to spin dephasing, when one relaxes the spin-projection approximation. Furthermore, spin-flip scattering between the spin bands needs to be taken into account in order to calculate voltages and spin accumulations induced by the magnetic dynamics. A phenomenological approach based on the Onsager reciprocity principle is developed, which allows us to capture the effect of spin dephasing and make a connection to the well studied problem of current-driven magnetic dynamics. A number of results that recently appeared in the literature are related and generalized.

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Yaroslav Tserkovnyak, Matthew Mecklenburg. 2008-04-02. Electron Transport Driven by Nonequilibrium Magnetic Textures. https://doi.org/10.1103/physrevb.77.134407

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