An alternative mechanism for current-induced antisymmetric lateral edge spin accumulations in ballistic two-dimensional electron gases |
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Authors: | Xijin Cao Haitao Huang Youliang Liu |
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Affiliation: | Department of Physics and Laboratory of Photonic Information Technology, South China Normal University, Guangdong 510631, PR China |
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Abstract: | In this Letter an alternative mechanism is proposed for current-induced antisymmetric lateral edge spin accumulations in thin strips of ballistic two-dimensional electron gases with intrinsic spin-orbit coupling. In this mechanism, the occurrence of current-induced antisymmetric lateral edge spin accumulations in a semiconductor strip is not due to a transverse spin current but originates from the combined action of the spin-orbit coupling, the boundary confinement on both lateral edges of the strip, and the time-reversal symmetry-breaking caused by the longitudinal charge current circulating through the strip. The results obtained in this Letter indicate that, the occurrence of current-induced antisymmetric lateral edge spin accumulations in a thin strip of a spin-orbit coupled two-dimensional electronic system does not need to be associated necessarily with a transverse spin current in principle. |
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Keywords: | 72.25.-b 73.23.-b 75.47.-m |
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