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Updated: Aug 6, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
Suppression of spin relaxation in submicron InGaAs wires
A W Holleitner1, V Sih, R C Myers
1Center for Spintronics and Quantum Computation, University of California, Santa Barbara, California 93106, USA. awsch@physics.ucsb.edu
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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