Spin-valley filtering induced by resonant states in silicene

Wen Li, Wei-Tao Lu () and Kai-Cai Li ()
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Wen Li: Linyi University
Wei-Tao Lu: Linyi University
Kai-Cai Li: Linyi University

The European Physical Journal B: Condensed Matter and Complex Systems, 2022, vol. 95, issue 10, 1-6

Abstract: Abstract We studied the spin and valley transport of silicene through a resonant-tunneling structure with electric field and magnetic field. It is demonstrated that a perfect spin-valley filtering effect can be obtained, where both spin and valley indices are polarized simultaneously. The spin-valley filtering benefits from the break of spatial invariance and the form of spin-valley-polarized resonant states. A high spin-valley-polarized conductance can be realized at certain values of the electric field. Furthermore, the resonant-tunneling structure composed of electric field and potential field is also feasible to fully filter spin-valley electrons, implying an electrically controlled spin-valley filter. Graphical abstract

Date: 2022
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DOI: 10.1140/epjb/s10051-022-00442-6

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