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Proceedings Paper

Superlattice behavior of carbon nanotubes in a transverse electric field
Author(s): Oleg V. Kibis; Lois Huggett; David G. W. Parfitt; Mikhail E. Portnoi
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Paper Abstract

Electron motion in an (n,1) carbon nanotube is shown to correspond to a de Broglie wave propagating along a helical line on the nanotube wall. This helical motion leads to periodicity of the electron potential energy in the presence of an electric field normal to the nanotube axis. The period of this potential is proportional to the nanotube radius and is greater than the interatomic distance in the nanotube. As a result, the behavior of an electron in an (n,1) nanotube subject to a transverse electric field is similar to that in a semiconductor superlattice. In particular, Bragg scattering of electrons from the long-range periodic potential results in the opening of gaps in the energy spectrum of the nanotube. Modification of the bandstructure is shown to be significant for experimentally attainable electric fields, which raises the possibility of applying this effect to novel nanoelectronic devices.

Paper Details

Date Published: 2 August 2004
PDF: 7 pages
Proc. SPIE 5509, Nanomodeling, (2 August 2004); doi: 10.1117/12.557655
Show Author Affiliations
Oleg V. Kibis, Novosibirsk State Technical Univ. (Russia)
Lois Huggett, Univ. of Exeter (United Kingdom)
David G. W. Parfitt, Univ. of Exeter (United Kingdom)
Mikhail E. Portnoi, Univ. of Exeter (United Kingdom)

Published in SPIE Proceedings Vol. 5509:
Akhlesh Lakhtakia; Sergey A. Maksimenko, Editor(s)

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