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

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.

10 pages, 2 figures

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Cited by in corpus (8)

• Spin dynamics in semiconductors
• Electric-field induced spin excitations in two-dimensional spin-orbit coupled systems
• Non-Markovian hole spin kinetics in $p$-type GaAs quantum wells
• Electrical and thermoelectric transport properties of two-dimensional fermionic systems with $k$-cubic spin-orbit coupling
• Magnetotransport properties of two-dimensional fermions with $k$-cubic Rashba spin-orbit interaction
• Microscopic theory for the Doppler velocimetry of spin propagation in semiconductor quantum wells
• Oscillation of spin polarization in a two-dimensional hole gas under a perpendicular magnetic field
• Spin Response to Localized Pumps: Exciton Polaritons Versus Electrons and Holes