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Analytical performance of 3 m and 3 m+1 armchair graphene nanoribbons under uniaxial strain

Kang, Eng Siew and Ismail, Razali (2014) Analytical performance of 3 m and 3 m+1 armchair graphene nanoribbons under uniaxial strain. Nanoscale Research Letters, 9 . ISSN 1556-276X

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Official URL: http://dx.doi.org/10.1186/1556-276X-9-598

Abstract

The electronic band structure and carrier density of strained armchair graphene nanoribbons (AGNRs) with widths of n =3 m and n =3 m +1 were examined using tight-binding approximation. The current-voltage (I-V) model of uniaxial strained n =3 m AGNRs incorporating quantum confinement effects is also presented in this paper. The derivation originates from energy dispersion throughout the entire Brillouin zone of uniaxial strained AGNRs based on a tight-binding approximation. Our results reveal the modification of the energy bandgap, carrier density, and drain current upon strain. Unlike the two-dimensional graphene, whose bandgap remains near to zero even when a large strain is applied, the bandgap and carrier density of AGNRs are shown to be sensitive to the magnitude of uniaxial strain. Discrepancies between the classical calculation and quantum calculation were also measured. It has been found that as much as 19% of the drive current loss is due to the quantum confinement. These analytical models which agree well with the experimental and numerical results provide physical insights into the characterizations of uniaxial strained AGNRs

Item Type:Article
Uncontrolled Keywords:bandgap, carrier density, drain current, graphene nanoribbons, uniaxial strain
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:51854
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:01 Feb 2016 03:53
Last Modified:27 Aug 2018 03:41

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