Spin-dephasing anisotropy for electrons in a diffusive quasi-1D GaAs wire

Abstract

We present a numerical study of dephasing of electron spin ensembles in a diffusive quasi-one-dimensional GaAs wire due to the D'yakonov-Perel' spin-dephasing mechanism. For widths of the wire below the spin precession length and for equal strength of Rashba and linear Dresselhaus spin-orbit fields a strong suppression of spin-dephasing is found. This suppression of spin-dephasing shows a strong dependence on the wire orientation with respect to the crystal lattice. The relevance for realistic cases is evaluated by studying how this effect degrades for deviating strength of Rashba and linear Dresselhaus fields, and with the inclusion of the cubic Dresselhaus term.

References in corpus (4)

• Ballistic spin-polarized transport and Rashba spin precession in semiconductor nanowires
• Suppression of Spin Relaxation in Submicron InGaAs Wires
• Interaction-induced magnetoresistance: From the diffusive to the ballistic regime
• Resonant spin polarization and spin current in a two-dimensional electron gas

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• Direction Dependence of Spin Relaxation in Confined 2D Systems
• Optical probing of spin dynamics of two-dimensional and bulk electrons in a GaAs/AlGaAs heterojunction system
• Numerical study of resonant spin relaxation in quasi-1D channels
• Kinetics of Spin Relaxation in Wires and Channels: Boundary Spin Echo and Tachyons
• Dynamics of Spin Relaxation in Finite-Size 2D Systems: an Exact Solution