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

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dc.creatorGunlycke, D.
dc.creatorLambert, C. J.
dc.creatorBailey, S. W. D.
dc.creatorPettifor, D. G.
dc.creatorBriggs, G. A. D.
dc.creatorJefferson, J. H.
dc.date2005-10-18
dc.date2006-02-02
dc.date.accessioned2026-07-07T06:44:32Z
dc.date.available2026-07-07T06:44:32Z
dc.descriptionWe propose a method to modulate the bandgaps in quasi-metallic 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 small 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. The bandgap dependence is verified by analytical calculations, which also agree with preceding analyses for the limit of no curvature.
dc.description6 pages, 2 figures, accepted to Europhysics Letters
dc.identifierhttps://arxiv.org/abs/cond-mat/0510480
dc.identifierhttp://arxiv.org/abs/cond-mat/0510480
dc.identifierEurophys. Lett., 73 (5), pp. 759-764 (2006)
dc.identifierdoi:10.1209/epl/i2005-10446-x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/102803
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titleBandgap modulation of narrow-gap carbon nanotubes in a transverse electric field
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