Eur. Phys. J. B (2013) 86: 4
https://doi.org/10.1140/epjb/e2012-30187-x

Regular Article

The estimation of current and differential conductance of armchair single-wall carbon nanotubes via dissipative energy method

¹ Department of Physics, Iran University of Science and Technology, Narmak, 16846 Tehran, Iran
² Computational Physical Science Laboratory, Department of Nano-Science, Institute for Studies in Theoretical Physics and Mathematics (IPM), PO Box 19395-5531 Tehran, Iran

^a e-mail: pouryaayria@gmail.com

Received: 3 March 2012
Received in final form: 29 May 2012
Published online: 26 December 2012

Abstract

We are going to apply dissipative energy method, considered as perturbation method, in order to investigate the effects of electron-optical phonon coupling on the electronic transport of armchair single wall carbon nanotubes. This method almost deals with the modeling of the behavior of electrons near ballistic regime. The results of calculations indicate that this model can be applied in estimating the current and the differential conductance of the armchair single-wall carbon nanotubes at low bias; however the perturbation method fails to reproduce the current and differential conductance at high voltages. Furthermore, this approach suggests a method that the observation of phonon energy modes involved in electron-phonon coupling becomes possible experimentally at low temperature.