{
  "id": "cond-mat/0510480",
  "version": "v2",
  "published": "2005-10-18T18:14:20.000Z",
  "updated": "2006-02-02T14:32:25.000Z",
  "title": "Bandgap modulation of narrow-gap carbon nanotubes in a transverse electric field",
  "authors": [
    "D. Gunlycke",
    "C. J. Lambert",
    "S. W. D. Bailey",
    "D. G. Pettifor",
    "G. A. D. Briggs",
    "J. H. Jefferson"
  ],
  "comment": "6 pages, 2 figures, accepted to Europhysics Letters",
  "journal": "Europhys. Lett., 73 (5), pp. 759-764 (2006)",
  "doi": "10.1209/epl/i2005-10446-x",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We 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 $\\pi$- and $\\sigma$-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.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2006-02-02T14:32:25.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "transverse electric field",
      "narrow-gap carbon nanotubes",
      "bandgap modulation",
      "curvature-induced bandgaps decrease",
      "electric field amplitude continues"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}