{
  "id": "1007.4417",
  "version": "v1",
  "published": "2010-07-26T10:33:59.000Z",
  "updated": "2010-07-26T10:33:59.000Z",
  "title": "Scanning Tunneling Microscopy and Spectroscopy study of charge inhomogeneities in bilayer Graphene",
  "authors": [
    "Shyam K. Choudhary",
    "Anjan K. Gupta"
  ],
  "comment": "5 pages, 5 figures",
  "journal": "Solid State Communications, March 2011, Volume 151, Issue 5, Pages 396-399",
  "doi": "10.1016/j.ssc.2010.12.010",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We report room temperature scanning tunneling microscopy and spectroscopy study of bilayer graphene prepared by mechanical exfoliation on SiO$_2$/Si surface and electrically contacted with gold pads using a mechanical mask. The bulk conductivity shows contribution from regions of varying electron density indicating significant charge inhomogeneity. Large scale topographic images show ripple like structures with a roughness of $\\sim$1nm while the small scale atomic resolution images show graphite-like triangular lattice. Local dI/dV-V tunnel spectra have an asymmetric V-shape with the minima location showing significant spatial variation indicating inhomogeneity in electron density of order 10$^{11}$ cm-2. The minima in spectra at a fixed location also shifts linearly with the gate voltage with a slope consistent with the field induced carrier density.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-07-26T10:33:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "scanning tunneling microscopy",
      "spectroscopy study",
      "bilayer graphene",
      "scale atomic resolution images",
      "electron density indicating significant"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Solid State Communications",
      "year": 2011,
      "month": "Mar",
      "volume": 151,
      "number": 5,
      "pages": 396
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011SSCom.151..396C"
    }
  }
}