External Electric Field Effect on Electrons Transport in Carbon Nanotubes

Sulemana S. Abukari, Samuel Y. Mensah, Musah Rabiu, Kofi W. Adu, Natalia G. Mensah, Kwadwo A. Dompreh, Anthony Twum, Matthew Amekpewu

Department of Applied Physics, University for Development Studies, Navorongo, Ghana.
Department of Mathematics, University of Cape Coast, Cape Coast, Ghana.
Department of Physics, Laser and Fibre Optics Centre, University of Cape Coast, Cape Coast, Ghana.
Department of Physics, The Pennsylvania State University, Altoona, USA; Materials Research Institute, The Pennsylvania State University, University Park, USA.

DOI: 10.4236/wjcmp.2013.34027                

Abstract

We consider a simple model of carbon nanotubes (CNTs) subject to external electric field E(t). Using a tight-binding approximation for the description of energy bands of CNTs, together with the standard Boltzmann transport equation and constant relaxation time, we predict the effect of self-induced transparency and absolute negative conductivity. The predicted effects may be useful in diagnostics of carbon nanotubes as well as in the amplification and efficiency conversion of electromagnetic signals.

Keywords

Carbon Nanotubes; Electric Field; Electric Current Density; Negative Differential Conductivity

Conflicts of Interest

The authors declare no conflicts of interest.

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