Precessionless spin transport wire confined in quasi-two-dimensional electron systems

Details Precessionless spin transport wire confined in quasi-two-dimensional electron systems Precessionless spin transport wire confined in quasi-two-dimensional electron systems

2004-08-29

arxiv.org/abs/cond-mat/0408638v2

J. Appl. Phys. 99, 08H707 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 4 figures, to be appeared in Journal of Applied Physics, Proceedings of the 50th MMM Conference

Scientific paper

10.1063/1.2172584

We demonstrate that in an inversion-asymmetric two-dimensional electron system 2DES with both Rashba and Dresselhaus spin-orbit couplings taken into account, certain transport directions on which no spin precession occurs can be found when the injected spin is properly polarized. By analyzing the expectation value of spin with respect to the injected electron state on each space point in the 2DES, we further show that the adjacent regions with technically reachable widths along these directions exhibit nearly conserved spin. Hence a possible application in semiconductor spintronics, namely, precessionless spin transport wire, is proposed.

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