Spin polarization in biased Rashba-Dresselhaus two-dimensional electron systems

Abstract

Based on spin-charge coupled drift-diffusion equations, which are derived from kinetic equations for the spin-density matrix in a rigorous manner, the electric-field-induced nonequilibrium spin polarization is treated for a two-dimensional electron gas with both Rashba and Dresselhaus spin-orbit coupling. Most emphasis is put on the consideration of the field-mediated spin dynamics for a model with equal Rashba and Dresselhaus coupling constants, in which the spin relaxation is strongly suppressed. Weakly damped electric-field-induced spin excitations are identified, which remind of space-charge waves in crystals.

12 pages

References in corpus (7)

• An Exact SU(2) Symmetry and Persistent Spin Helix in a Spin-Orbit Coupled System
• Anisotropic current-induced spin accumulation in the two-dimensional electron gas with spin-orbit coupling
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• Persistent spin helix in Rashba-Dresselhaus two-dimensional electron systems
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• Spin diffusion/transport in $n$-type GaAs quantum wells
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Cited by in corpus (1)

• Electric-field induced spin excitations in two-dimensional spin-orbit coupled systems