Title
An electric field tunable energy band gap at silicene/(0001) ZnS interfaces An electric field tunable energy band gap at silicene/(0001) ZnS interfaces
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Cambridge ,
Subject
Physics
Chemistry
Source (journal)
Physical chemistry, chemical physics / Chemical Society [London] - Cambridge, 1999, currens
Volume/pages
15(2013) :11 , p. 3702-3705
ISSN
1463-9076
1463-9084
ISI
000315165100002
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The interaction of silicene, the silicon counterpart of graphene, with (0001) ZnS surfaces is investigated theoretically, using first-principles simulations. The charge transfer occurring at the silicene/(0001) ZnS interface leads to the opening of an indirect energy band gap of about 0.7 eV in silicene. Remarkably, the nature (indirect or direct) and magnitude of the energy band gap of silicene can be controlled by an external electric field: the energy gap is predicted to become direct for electric fields larger than about 0.5 V angstrom(-1), and the direct energy gap decreases approximately linearly with the applied electric field. The predicted electric field tunable energy band gap of the silicene/(0001) ZnS interface is very promising for its potential use in nanoelectronic devices.
E-info
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