科研之友
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摘要
A spin-polarized current direction controller scheme is proposed based on a nonuniform Rashba quantum wire. It is shown that vertical bar P-z(LR)vertical bar = vertical bar P-z(RL)vertical bar, whereas their signs are opposite, and the effect of this phenomenon is due to the two broken symmetries and the unbroken C-2-rotation symmetry of the investigated system. In addition, the spin-polarized current is nonzero even with a strong disorder strength, which demonstrates that this structure may be utilized for potential applications.
