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Intrinsic Spin Hall Effect in the presence of Extrinsic Spin-Orbit Scattering

Wang-Kong Tse·S. Das Sarma
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Abstract

Intrinsic and extrinsic spin Hall effects are considered together on an equal theoretical footing for the Rashba spin-orbit coupling in two-dimensional (2D) electron and hole systems, using the diagrammatic method for calculating the spin Hall conductivity. Our analytic theory for the 2D holes shows the expected lowest-order additive result for the spin Hall conductivity. But, the 2D electrons manifest a very surprising result, exhibiting a non-analyticity in the Rashba coupling strength $α$ where the strictly extrinsic spin Hall conductivity (for $α= 0$) cannot be recovered from the $α\to 0$ limit of the combined theory. The theoretical results are discussed in the context of existing experimental results.

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Wang-Kong Tse, S. Das Sarma. 2006-02-27. Intrinsic Spin Hall Effect in the presence of Extrinsic Spin-Orbit Scattering. https://doi.org/10.1103/physrevb.74.245309

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