Universiti Teknologi Malaysia Institutional Repository

Modelling of graphene nanoribbon fermi energy

Johari, Zaharah and Ismail, Razali and Ahmadi, Mohammad Taghi and Chang, Desmond Yih Chek and Amin, N. Aziziah (2010) Modelling of graphene nanoribbon fermi energy. Journal of Nanomaterials . pp. 1-6. ISSN 1687-4110


Official URL: http://dx.doi.org/10.1155/2010/909347


Graphene nanoribbon (GNR) is a promising alternative to carbon nanotube (CNT) to overcome the chirality challenge as a nanoscale device channel. Due to the one-dimensional behavior of plane GNR, the carrier statistic study is attractive. Research works have been done on carrier statistic study of GNR especially in the parabolic part of the band structure using Boltzmann approximation (nondegenerate regime). Based on the quantum confinement effect, we have improved the fundamental study in degenerate regime for both the parabolic and nonparabolic parts of GNR band energy. Our results demonstrate that the band energy of GNR near to the minimum band energy is parabolic. In this part of the band structure, the Fermi-Dirac integrals are sufficient for the carrier concentration study. The Fermi energy showed the temperature-dependent behavior similar to any other one-dimensional device in nondegenerate regime. However in the degenerate regime, the normalized Fermi energy with respect to the band edge is a function of carrier concentration. The numerical solution of Fermi-Dirac integrals for nonparabolic region, which is away from the minimum energy band structure of GNR, is also presented.

Item Type:Article
Uncontrolled Keywords:band structure, carbon nanotubes, fermi level
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:26256
Deposited By: Narimah Nawil
Deposited On:29 Jun 2012 11:33
Last Modified:30 Nov 2018 14:24

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