Title
Spin- and valley-dependent miniband structure and transport in silicene superlattices
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Subject
Physics
Source (journal)
PHYSICAL REVIEW B
Volume/pages
93(2016) :12 , 6 p.
ISSN
2469-9950
Article Reference
125425
ISI
000372715800009
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We investigate silicene superlattices in the presence of a tunable barrier potential U, an exchange field M, and a perpendicular electric field E-z. The resulting miniband structure depends on the spin and valley indices and on the fields M and E-z. These fields determine the minigaps and also affect the additional Dirac points brought about by the periodic potential U. In addition, we consider diffusive transport and assess its dependence on the spin and valley indices as well as on temperature. The corresponding spin and valley polarizations strongly depend on the potential U and can be made almost 100% at very low temperatures at particular values of the Fermi energy.
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Full text (open access)
https://repository.uantwerpen.be/docman/irua/1ac4cb/133194.pdf
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