{
  "id": "1002.0817",
  "version": "v2",
  "published": "2010-02-03T19:36:15.000Z",
  "updated": "2010-02-04T23:54:18.000Z",
  "title": "Absence of a metallic phase in charge-neutral graphene with a random gap",
  "authors": [
    "J. H. Bardarson",
    "M. V. Medvedyeva",
    "J. Tworzydlo",
    "A. R. Akhmerov",
    "C. W. J. Beenakker"
  ],
  "comment": "3 pages, 3 figures",
  "journal": "Phys. Rev. B 81, 121414(R) (2010)",
  "doi": "10.1103/PhysRevB.81.121414",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "It is known that fluctuations in the electrostatic potential allow for metallic conduction (nonzero conductivity in the limit of an infinite system) if the carriers form a single species of massless two-dimensional Dirac fermions. A nonzero uniform mass $\\bar{M}$ opens up an excitation gap, localizing all states at the Dirac point of charge neutrality. Here we investigate numerically whether fluctuations $\\delta M \\gg \\bar{M} \\neq 0$ in the mass can have a similar effect as potential fluctuations, allowing for metallic conduction at the Dirac point. Our negative conclusion confirms earlier expectations, but does not support the recently predicted metallic phase in a random-gap model of graphene.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2010-02-04T23:54:18.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "72.15.Rn",
      "72.80.Vp",
      "73.20.Fz",
      "73.20.Jc"
    ],
    "keywords": [
      "metallic phase",
      "charge-neutral graphene",
      "random gap",
      "metallic conduction",
      "negative conclusion confirms earlier expectations"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2010,
      "month": "Mar",
      "volume": 81,
      "number": 12,
      "pages": 121414
    },
    "note": {
      "typesetting": "TeX",
      "pages": 3,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhRvB..81l1414B"
    }
  }
}