Two-Dimensional Simulation of Quantum Tunneling across Barrier with Surface Roughness

We present two-dimensional simulation of quantum tunneling across a potential barrier with surface roughness using quantum lattice–gas automata. The impact of the nonuniformity of the barrier thickness on the transmission coefficient is discussed by comparing the results of one- and two-dimensional...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 44; no. 12R; p. 8288
Main Authors Sakai, Atsushi, Kamakura, Yoshinari, Taniguchi, Kenji
Format Journal Article
LanguageEnglish
Published 01.12.2005
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Summary:We present two-dimensional simulation of quantum tunneling across a potential barrier with surface roughness using quantum lattice–gas automata. The impact of the nonuniformity of the barrier thickness on the transmission coefficient is discussed by comparing the results of one- and two-dimensional tunneling simulations. The dependence of the transmission coefficient on the parallel momentum of the incident electron is also investigated, and it is demonstrated that the scattering by the surface roughness on the incident side of the interface causes the violation of the parallel momentum conservation. We discuss the effect of the obtained results on the gate current modeling for the scaled metal–oxide–semiconductor field-effect transistors.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.44.8288