Optical and electric control of spin and valley polarization transport in magnetic WSe2 superlattice
The magnetic WSe2 superlattice system is examined here to explore effects of non-resonant circularly polarized light and gate voltage on tunneling,spin and valley polarization.Manipulation of ballistic transport in single-layer WSe2,as well as control of the quantum transport in the periodic array of NM-FM-NM junctions based on magnetic WSe2 are identified.The critical value of circularly polarized light is found to eliminate the transmission energy gap by increasing the number of potential barriers.The circularly polarized light and gate voltage could be regarded as a transmission valve and a sensitive knob for controlling the spin and valley polarization.Klein tunneling in WSe2 super lattice is spin-valley dependent.Spin-valley polarization can be adjusted and converted by grid voltage and circularly polarized light.
magnetic WSe2superlatticecircularly polarized lightgate voltagespin transportvalley polarization transport
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