Suppression of spin relaxation in submicron InGaAs wires

被引:114
作者
Holleitner, A. W. [1 ]
Sih, V. [1 ]
Myers, R. C. [1 ]
Gossard, A. C. [1 ]
Awschalom, D. D. [1 ]
机构
[1] Univ Calif Santa Barbara, Ctr Spintron & Quantum Computat, Santa Barbara, CA 93106 USA
关键词
D O I
10.1103/PhysRevLett.97.036805
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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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页数:4
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