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Band structure effect on carbon nanotube fermi energy

Ahmadi, Mohammad Taghi and Fallahpour, Amir Hosssein and Kouhdaragh, Vahid and Ismail, Razali (2009) Band structure effect on carbon nanotube fermi energy. International Review of Physics, 3 (4). pp. 224-227. ISSN 1971 - 680X

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Abstract

The band structure of carbon nanotube (CNT) is obtained from the graphene band structure. This method demonstrates that, the band energy of CNT near to the minimum band energy is parabolic. However it’s not parabolic in other part of the band energy. For non-parabolic condition density of state proportion of numerical integrals which is different from Fermi integrals and numerical solution implemented in degenerate and nondegenerate approximation. Given density of state the carrier concentration is obtained based on the Numerical method as an alternative for tabulated Fermi – Dirac integrals which we call them Carbon nanotube Fermi integrals (CNFI). According to numerically solved Carbon nanotube Fermi integrals, Fermi energy in non-parabolic region of band structure with respect to the band edge is function of temperature that independent of the carrier concentration in the nondegenrate regime. In the other strongly degenerate, the Fermi energy is a function of carrier concentration appropriate for given dimensionality, but is independent of temperature.

Item Type:Article
Uncontrolled Keywords:carbon nanotube, fermi energy, non-parabolic band energy
Subjects:T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:18978
Deposited By: Ramli Haron
Deposited On:29 Nov 2011 09:01
Last Modified:29 Nov 2011 09:01

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