Abstract:
:We study the spin and valley dependent transport in a silicene superlattice under the influence of a magnetic exchange field, a perpendicular electric field and a voltage potential. It is found that a gate-voltage-controllable fully spin and valley polarized current can be obtained in the proposed device, and the spin and valley polarizations are sensitive oscillatory functions of the voltage potential. In properly designed superlattice structure, the spin and valley polarizations can be reversed from -100% to 100% by a slight change in the external voltage potential. The energy dispersion relations of the superlattice structure are also investigated, which helps us to understand the effects of the superlattice structure. The switching of the spin direction and the valley of the tunneling electrons by a gate voltage enables new possibilities for spin or valley control in silicene-based spintronics and valleytronics.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Zhang Q,Chan KS,Li Jdoi
10.1038/srep33701subject
Has Abstractpub_date
2016-09-20 00:00:00pages
33701issn
2045-2322pii
srep33701journal_volume
6pub_type
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