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Transition of equilibrium stochastic to unidirectional velocity vectors in a nanowire subjected to a towering electric field

Arora, Vijay Kumar and Loong Peng, Michael Tan and Hashim, Abd Manaf and Chek, Desmond C. Y. (2010) Transition of equilibrium stochastic to unidirectional velocity vectors in a nanowire subjected to a towering electric field. Journal of Applied Physics, 108 (11). 001-008. ISSN 0021-8979

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Official URL: http://dx.doi.org/10.1063/1.3514128

Abstract

The equilibrium Fermi–Dirac distribution is revealed to transform to an asymmetric distribution in a very high electric field where the energy gained (or lost) in a mean free path is of paramount importance. The equilibrium stochastic velocity vectors randomly oriented in and opposite to the quasifree direction of a nanowire are shown to streamline in the presence of an extremely high electric field. The complete velocity-field characteristics are acquired. The ultimate directed drift velocity in a towering field is shown to be limited to the appropriately averaged Fermi velocity in the strongly degenerate limit where only half of the quantum states are accessible to electrons. This unidirectional velocity does not sensitively depend on the low-field Ohmic mobility. The emission of a quantum in the form of a phonon or photon lowers the saturation velocity from its ultimate unidirectional limit.

Item Type:Article
Uncontrolled Keywords:electric field effects, nanowires, stochastic processes
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:26564
Deposited By: Liza Porijo
Deposited On:18 Jul 2012 02:52
Last Modified:20 Aug 2014 08:53

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