Diffusive-Ballistic Crossover and the Persistent Spin Helix

Abstract

Conventional transport theory focuses on either the diffusive or ballistic regimes and neglects the crossover region between the two. In the presence of spin-orbit coupling, the transport equations are known only in the diffusive regime, where the spin precession angle is small. In this paper, we develop a semiclassical theory of transport valid throughout the diffusive - ballistic crossover of a special SU(2) symmetric spin-orbit coupled system. The theory is also valid in the physically interesting regime where the spin precession angle is large. We obtain exact expressions for the density and spin structure factors in both 2 and 3 dimensional samples with spin-orbit coupling.

4 pages, 3 figures

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Cited by in corpus (7)

• Spin dynamics in semiconductors
• Persistent Spin Textures in Semiconductor Nanostructures
• Unified theory of spin-dynamics in a two dimensional electron gases with arbitrary spin-orbit coping strength at finite temperature
• Relaxation mechanisms of the persistent spin helix
• Reading charge transport from spin dynamics on the surface of topological insulator
• Spin dynamics in the strong spin-orbit coupling regime
• Spin dynamics in a spin-orbit coupled Fermi gas