2004/09/30 by Yan Li, Slava V. Rotkin, Umberto Ravaioli · 14 citations
Materials Science · Physics and Astronomy · #Band gap #Boron and Carbon Nanomaterials Research #Carbon Nanotubes in Composites #Carbon nanotube #Electronic band structure #Graphene research and applications #Mechanical properties of carbon nanotubes #Nanotube #Optical properties of carbon nanotubes #RADIUS #Symmetry breaking #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.1811792
published in Applied Physics Letters 85(18), 4178-4180 (American Institute of Physics) · 3 pages, 3 figures, published on APL
openalex publication_date 2004/11/01 · arxiv created 2005/11/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The electronic band structure of armchair carbon nanotubes may be considerably modified by potentials with angular dependence. Different angular modes Vq∼cosqθ have been studied within a tight-binding scheme. Using symmetry arguments, we demonstrate a bandgap opening in these metallic nanotubes when certain selection rules are satisfied for both potential and nanotube structure. We estimate the bandgap opening as a function of both the external potential strength and the nanotube radius and suggest an effective mechanism of metal-semiconductor transition by combination of different forms of perturbations.