Opposite spin accumulations on the transverse edges by the confining potential
arXiv:cond-mat/0604502 · doi:10.1103/PhysRevB.74.155313
Abstract
We show that the spin-orbit interaction induced by the boundary confining potential causes opposite spin accumulations on the transverse edges in a zonal two-dimensional electron gas in the presence of external longitudinal electric field. While the bias is reversed, the spin polarized direction is also reversed. The intensity of the spin accumulation is proportional to the bias voltage. In contrast to the bulk extrinsic and intrinsic spin Hall effects, the spin accumulation by the confining potential is almost unaffected by impurity and survives even in strong disorder. The result provides a new mechanism to explain the recent experimental data.
arXiv comment5 pages, 6 figures
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- Enhanced spin Hall effect by tuning antidot potential: Proposal for a spin filter
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- Helical edge states induced by lateral spin-orbit coupling