Suppression of Spin Relaxation in Submicron InGaAs Wires

Details Suppression of Spin Relaxation in Submicron InGaAs Wires Suppression of Spin Relaxation in Submicron InGaAs Wires

2006-02-06

arxiv.org/abs/cond-mat/0602155v1

Phys. Rev. Lett. 97, 036805 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.97.036805

We investigate electron spin dynamics in narrow two-dimensional n-InGaAs channels as a function of the channel width. The spin relaxation times increase with decreasing channel width, in accordance with recent theoretical predictions based on the dimensionally-constrained D'yakonov-Perel' mechanism. Surprisingly, the suppression of the relaxation rate, which is anticipated for the one-dimensional limit, is observed for widths that are an order of magnitude larger than the electron mean free path. We find the spin precession length and the channel width to be the relevant length scales for interpreting these results.

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