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Title: Theoretical study of electronic transport properties of a graphene-silicene bilayer

Electronic transport properties of a graphene-silicene bilayer system are studied using density-functional theory in combination with the nonequilibrium Green's function formalism. Depending on the energy of the electrons, the transmission can be larger in this system as compared to the sum of the transmissions of separated graphene and silicene monolayers. This effect is related to the increased electron density of states in the bilayer sample. At some energies, the electronic states become localized in one of the layers, resulting in the suppression of the electron transmission. The effect of an applied voltage on the transmission becomes more pronounced in the layered sample as compared to graphene due to the larger variation of the electrostatic potential profile. Our findings will be useful when creating hybrid nanoscale devices where enhanced transport properties will be desirable.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Qatar Environment and Energy Research Institute, Qatar Foundation, P.O. Box 5825, Doha (Qatar)
  2. Department of Physics, King Fahd University of Petroleum and Minerals, 31261 Dhahran (Saudi Arabia)
  3. (Saudi Arabia)
  4. Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen (Belgium)
Publication Date:
OSTI Identifier:
22412929
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 22; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; DENSITY FUNCTIONAL METHOD; DENSITY OF STATES; ELECTRIC POTENTIAL; ELECTRON DENSITY; ELECTRONS; GRAPHENE; GREEN FUNCTION; LAYERS; NANOSTRUCTURES; SILICENE; VARIATIONS