Spin-current absorption by inhomogeneous spin-orbit coupling

Details Spin-current absorption by inhomogeneous spin-orbit coupling Spin-current absorption by inhomogeneous spin-orbit coupling

2012-04-10

arxiv.org/abs/1204.2189v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 4 figures

Scientific paper

We theoretically study the spin current induced by an inhomogeneous spin-orbit coupling due to impurities. Using the Keldysh Green's function formalism, we present analytical expressions of the local and diffusive spin currents under an external electric field and find a spin-current generation in the presence of both gradient of the spin-orbit strength and that of the external field. The resulting diffusive spin current indicates the absorption of the spin current at the interface between materials with different spin-orbit coupling strengths, which is exemplified with an experimentally relevant setup.

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