{
  "id": "0711.3748",
  "version": "v1",
  "published": "2007-11-23T15:08:34.000Z",
  "updated": "2007-11-23T15:08:34.000Z",
  "title": "On the effect of weak disorder on the density of states in graphene",
  "authors": [
    "B. Dóra",
    "K. Ziegler",
    "P. Thalmeier"
  ],
  "comment": "7 pages, 5 figures",
  "journal": "Phys. Rev. B 77, 115422 (2008)",
  "doi": "10.1103/PhysRevB.77.115422",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "The effect of weak potential and bond disorder on the density of states of graphene is studied. By comparing the self-consistent non-crossing approximation on the honeycomb lattice with perturbation theory on the Dirac fermions, we conclude, that the linear density of states of pure graphene changes to a non-universal power-law, whose exponent depends on the strength of disorder like 1-4g/sqrt{3}t^2\\pi, with g the variance of the Gaussian disorder, t the hopping integral. This can result in a significant suppression of the exponent of the density of states in the weak-disorder limit. We argue, that even a non-linear density of states can result in a conductivity being proportional to the number of charge carriers, in accordance with experimental findings.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2007-11-23T15:08:34.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "81.05.Uw",
      "71.10.-w",
      "72.15.-v"
    ],
    "keywords": [
      "weak disorder",
      "pure graphene changes",
      "self-consistent non-crossing approximation",
      "honeycomb lattice",
      "perturbation theory"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2008,
      "month": "Mar",
      "volume": 77,
      "number": 11,
      "pages": 115422
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvB..77k5422D"
    }
  }
}