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arXiv · 0905.2771

Bulk Spin-Hall Effect

Brandon Anderson·Tudor D. Stanescu·Victor Galitski
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Abstract

We show that a two-dimensional spin-orbit-coupled system in the presence of a charge/spin-density wave with a wave-vector perpendicular to an applied electric field supports bulk manifestations of the direct/inverse spin-Hall effect. We develop a theory of this phenomenon in the framework of the spin diffusion equation formalism and show that, due to the inhomogeneity created by a spin-grating, an anomalous bulk charge-density wave is induced away from sample boundaries. The optimal conditions for the observation of the effect are determined. The main experimental manifestation of the bulk spin-Hall effect, the induced charge/spin-density-wave, is characterized by a pi/2-phase shift relative to the initial non-homogeneous spin/charge-polarization profile and has a non-monotonic time-varying amplitude.

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Brandon Anderson, Tudor D. Stanescu, Victor Galitski. 2009-05-18. Bulk Spin-Hall Effect. https://doi.org/10.1103/physrevb.81.121304

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