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

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 $\alpha$ where the strictly extrinsic spin Hall conductivity (for $\alpha =0$) cannot be recovered from the $\alpha \to 0$ limit of the combined theory. The theoretical results are discussed in the context of existing experimental results.

5 pages, 2 figures

References in corpus (3)

• Theory of Spin Hall conductivity in n-doped GaAs
• Spin-Hall effect in a disordered 2D electron-system
• Spin-Hall transport of heavy holes in III-V semiconductor quantum wells

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• Extrinsic Entwined with Intrinsic Spin Hall Effect in Disordered Mesoscopic Bars
• Kinetic investigation on extrinsic spin Hall effect induced by skew scattering
• Frequency- and transverse wave-vector-dependent spin Hall conductivity in two-dimensional electron gas with disorder
• Semiconductor Spintronics: Progress and Challenges
• Hanle Effect near Boundaries