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Strained graphene: tight-binding and density functional calculations

Lookup NU author(s): Professor Patrick Briddon

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Abstract

We determine the band structure of graphene under strain using density functional calculations. The ab initio band structure is then used to extract the best fit to the tight-binding hopping parameters used in a recent microscopic model of strained graphene. It is found that the hopping parameters may increase or decrease upon increasing strain, depending on the orientation of the applied stress. The fitted values are compared with an available parameterization for the dependence of the orbital overlap on the distance separating the two carbon atoms. It is also found that strain does not induce a gap in graphene, at least for deformations up to 10%.


Publication metadata

Author(s): Ribeiro RM, Pereira VM, Peres NMR, Briddon PR, Neto AHC

Publication type: Article

Publication status: Published

Journal: New Journal of Physics

Year: 2009

Volume: 11

Pages: -

ISSN (print): 1367-2630

ISSN (electronic):

Publisher: 1367-2630

URL: http://dx.doi.org/10.1088/1367-2630/11/11/115002

DOI: 10.1088/1367-2630/11/11/115002


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