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Quantum transport in nanowires and nanographene

Arora, Vijay Kumar (2012) Quantum transport in nanowires and nanographene. In: 2012 28th International Conference on Microelectronics - Proceedings, MIEL 2012. IEEE, New York, USA, pp. 3-10. ISBN 978-146730238-8

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Official URL: http://dx.doi.org/10.1109/MIEL.2012.6222787

Abstract

Transport in nanowires and nanographene with emphasis on nanotubes is reviewed from classical to quantum, low-field to high-field, nondegenrate to degenerate, scattering limited to ballistic, and beyond. Nonequilibrium Arora distribution function (NEADF) is shown to be an outgrowth of the Fermi-Dirac statistics by inclusion of the energy gained in a mean free path (mfp). NEADF is highly asymmetric with electrons changing equilibrium random phase to extreme nonequilibrium unilateral phase in a towering electric field. The drift response to the electric field is shown to be limited to the unilateral intrinsic velocity appropriate for twice the carrier concentration as electrons transfer from x-direction to +x-direction in the presence of an extremely high electric field in the x-direction. An electron temperature for degenerate statistics is defined to make it compatible with nondegenrate statistics. The intrinsic velocity giving saturation is shown to be independent of the scattering-limited or ballistic mobility. Optical phonon emission may lower the saturation velocity. In a low-field domain, the mobility may become size-dependent and is ballistic when injection from the ohmic contacts is considered.

Item Type:Book Section
Additional Information:Indexed by Scopus
Uncontrolled Keywords:drift response, fermi-dirac statistics, high electric fields, high-field, intrinsic velocity
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:35810
Deposited By: Fazli Masari
Deposited On:11 Nov 2013 09:42
Last Modified:02 Feb 2017 05:04

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