Abstract
Abstract We have theoretically investigated the spin- and valley-dependent transport properties in a silicene superlattice under strain, with extrinsic Rashba spin–orbit coupling. It is demonstrated that due to the extrinsic Rashba spin–orbit coupling, spin-inversion can be achieved. It is shown that the valley and spin polarizations increase with increasing the number of superlattice barriers, and the magnitude and sign of valley and spin polarizations can be tuned by strain and extrinsic Rashba spin–orbit coupling. It is also found that the spin polarization through this superlattice reaches a maximum value at 2% strain. In particular, the fully valley polarized current can be achieved by adjusting the strain strength.
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