Lancaster EPrints

Bandgap modulation of narrow-gap carbon nanotubes in a transverse electric field.

Gunlyke, D. and Lambert, C. J. and Bailey, S. W. D. and Pettifor, G. and Briggs, G. A. D. and Jefferson, J. H. (2006) Bandgap modulation of narrow-gap carbon nanotubes in a transverse electric field. Europhysics Letters, 73 (5). pp. 759-764. ISSN 0295-5075

Full text not available from this repository.

Abstract

We propose a method to modulate the bandgaps in narrow-gap carbon nanotubes using a transverse electric field. Unlike previous investigations, we include curvature effects of the nanotubes by incorporating both π- and σ-orbitals in our tight-binding calculations. The calculations show that the narrow curvature-induced bandgaps decrease quadratically with electric field amplitude to zero. As the electric field amplitude continues to increase, the bandgap then expands in a similar manner to that presented in earlier studies on metallic nanotubes. The bandgap dependence is verified by analytical calculations, which also agree with preceding analyses for the limit of no curvature.

Item Type: Article
Journal or Publication Title: Europhysics Letters
Additional Information: The final, definitive version of this article has been published in the Journal, Europhysics Letters, 73 (5), 2006, © EDP Sciences.
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 557
Deposited By: Prof Colin J. Lambert
Deposited On: 20 Jun 2007
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 22:08
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/557

Actions (login required)

View Item