Suppression of Spin Relaxation in Submicron InGaAs Wires

2006/02/06 by A. W. Holleitner, V. Sih, R. C. Myers +2 · 4 citations
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.97.036805

published as Phys. Rev. Lett. 97, 036805 (2006) · 5 pages, 4 figures

arxiv created 2006/02/06 · arxiv updated 2009/12/01

Abstract

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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