Spin dynamics in the strong spin-orbit coupling regime

Abstract

We study the spin dynamics in a high-mobility two dimensional electron gas (2DEG) with generic spin-orbit interactions (SOIs). We derive a set of spin dynamic equations which capture the purely exponential to the damped oscillatory spin evolution modes observed in different regimes of SOI strength. Hence we provide a full treatment of the D'yakonov-Perel's mechanism by using the microscopic linear response theory from the weak to the strong SOI limit. We show that the damped oscillatory modes appear when the electron scattering time is larger than half of the spin precession time due to the SOI, in agreement with recent observations. We propose a new way to measure the scattering time and the relative strength of Rashba and linear Dresselhaus SOIs based on these modes and optical grating experiments. We discuss the physical interpretation of each of these modes in the context of Rabi oscillation.

8 pages, 9 figures

References in corpus (7)

• Emergence of the persistent spin helix in semiconductor quantum wells
• Spin current and polarization in impure 2D electron systems with spin-orbit coupling
• Electron spin relaxation in bulk III-V semiconductors from a fully microscopic kinetic spin Bloch equation approach
• Non-diffusive spin dynamics in a two-dimensional electron gas
• Oscillatory D'yakonov-Perel' spin dynamics in two dimensional electron gases
• Diffusive-Ballistic Crossover and the Persistent Spin Helix
• Random walk approach to spin dynamics in a two-dimensional electron gas with spin-orbit coupling

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• Reading charge transport from spin dynamics on the surface of topological insulator
• Spin drift and diffusion in one- and two-subband helical systems
• Spin freezing by Anderson localization in one-dimensional semiconductors
• Rashba torque beyond the Boltzmann regime
• Anisotropic spin dynamics in antiferromagnets with a nonrelativistic spin splitting
• Spin Response to Localized Pumps: Exciton Polaritons Versus Electrons and Holes
• Mesoscopic scattering dynamics under generic uniform SU(2) gauge fields: Spin-momentum relaxation and coherent backscattering