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

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

2008-10-08

arxiv.org/abs/0810.1413v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1007/s10948-009-0525-2

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.

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