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research article

Electronic transport in B-N substituted bilayer graphene nanojunctions

Giofre, Daniele  
•
Ceresoli, Davide
•
Fratesi, Guido
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2016
Physical Review B

We investigated a suspended bilayer graphene where the bottom/top layer is doped by boron/nitrogen substitutional atoms. By using density functional theory calculations, we found that at high dopant concentration (one B-N pair every 32 C atoms), the electronic structure of the bilayer does not depend on the B-N distance but on the relative occupation of the bilayer graphene sublattices by B and N. The presence of the dopants and the consequent charge transfer establish a built-in electric field between the layers, giving rise to an energy gap. We further investigated the electronic transport properties and found that intralayer current is weakly influenced by the presence of these dopants while the interlayer one is enhanced for biases, allowing an easy tunneling between layers. This effect leads to current rectification in asymmetric junctions.

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Type
research article
DOI
10.1103/PhysRevB.93.205420
Web of Science ID

WOS:000375997100007

Author(s)
Giofre, Daniele  
•
Ceresoli, Davide
•
Fratesi, Guido
•
Trioni, Mario I.
Date Issued

2016

Publisher

Amer Physical Soc

Published in
Physical Review B
Volume

93

Issue

20

Article Number

205420

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
COSMO  
Available on Infoscience
July 19, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/127715
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