Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-04-21
Phys. Rev. B 74, 155313(2006)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 6 figures
Scientific paper
10.1103/PhysRevB.74.155313
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.
Hu Jiangping
Sun Qing-feng
Tang Liang
Xing Yanxia
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