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Carbon nanotube capacitance model in degenerate and nondegenerate regimes

Ahmadi, Mohammad Taghi and Webb, J. F. and Amin, N. A. and Mousavi, S. M. and Sadeghi, H. and Ismail, Razali and Neilchiyan, M. R. (2011) Carbon nanotube capacitance model in degenerate and nondegenerate regimes. In: Proceedings Of The Fourth Global Conference On Power Control And Optimization. American Institute of Physics, 173 -176. ISBN 978-073540893-7

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Official URL: http://dx.doi.org/10.1063/1.3592461

Abstract

In this work, fundamental results on carrier statistics in a carbon nanotube treated as a one-dimensional material are presented. Also the effect of degeneracy on the capacitance of the carbon nanotube channel in a carbon nan-otube field effect transistor is discussed. A quantum capacitance as well as a classical capacitance is revealed. Furthermore it is shown that for low gate voltage, the total capacitance is equivalent to the classical capacitance but for high gate voltage it is equivalent to the quantum capacitance. We predict that in the nondegenerate regime, the total capacitance is equivalent to the classical capacitance and that the quantum capacitance can be neglected, whereas only quantum capacitance needs to be taken into account in the calculation of the total capacitance in the degenerate regime.

Item Type:Book Section
Uncontrolled Keywords:carbon nanotubes, degenerate, field effect transistor, nondegenerate, quantum capacitance
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:28925
Deposited By: Liza Porijo
Deposited On:04 Dec 2012 04:36
Last Modified:04 Dec 2012 04:36

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