Suppression of Spin Relaxation in Submicron InGaAs Wires

A. W. Holleitner, V. Sih, R. C. Myers, A. C. Gossard, and D. D. Awschalom
Phys. Rev. Lett. 97, 036805 – Published 20 July 2006

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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  • Received 6 February 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.036805

©2006 American Physical Society

Authors & Affiliations

A. W. Holleitner*, V. Sih, R. C. Myers, A. C. Gossard, and D. D. Awschalom

  • Center for Spintronics and Quantum Computation, University of California, Santa Barbara, California 93106, USA

  • *Present address: Center for NanoScience (CeNS), Munich, Germany.
  • Electronic address: awsch@physics.ucsb.edu

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Issue

Vol. 97, Iss. 3 — 21 July 2006

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