Anomalous Rashba spin-orbit interaction in InAs/GaSb quantum wells
arXiv:0803.4310 · doi:10.1063/1.2909544
Abstract
We investigate theoretically the Rashba spin-orbit interaction in InAs/GaSb quantum wells(QWs). We find that the Rashba spin-splitting (RSS) depends sensitively on the thickness of the InAs layer. The RSS exhibits nonlinear behavior for narrow InAs/GaSb QWs and the oscillating feature for wide InAs/GaSb QWs. The nonlinear and oscillating behaviors arise from the weakened and enhanced interband coupling. The RSS also show asymmetric features respect to the direction of the external electric field.
3 pages, 4 figures. Appl. Phys. Lett. (in press)