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Spin-Hall effect and spin-coherent excitations in a strongly confined two-dimensional hole gas

P. Kleinert·V. V. Bryksin
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Abstract

Based on a rigorous quantum-kinetic approach, spin-charge coupled drift-diffusion equations are derived for a strongly confined two-dimensional hole gas. An electric field leads to a coupling between the spin and charge degrees of freedom. For weak spin-orbit interaction, this coupling gives rise to the intrinsic spin-Hall effect. There exists a threshold value of the spin-orbit coupling constant that separates spin diffusion from ballistic spin transport. In the latter regime, undamped spin-coherent oscillations are observed. This result is confirmed by an exact microscopic approach valid in the ballistic regime.

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P. Kleinert, V. V. Bryksin. 2007-01-25. Spin-Hall effect and spin-coherent excitations in a strongly confined two-dimensional hole gas. https://doi.org/10.1103/physrevb.76.073314

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