{
  "id": "cond-mat/0608720",
  "version": "v1",
  "published": "2006-08-31T14:01:12.000Z",
  "updated": "2006-08-31T14:01:12.000Z",
  "title": "Coherent transport in graphene nanoconstrictions",
  "authors": [
    "F. Muñoz-Rojas",
    "D. Jacob",
    "J. Fernández-Rossier",
    "J. J. Palacios"
  ],
  "comment": "9 pages, 9 figures",
  "journal": "Phys. Rev. B74, 195417 (2006)",
  "doi": "10.1103/PhysRevB.74.195417",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We study the effect of a structural nanoconstriction on the coherent transport properties of otherwise ideal zig-zag-edged infinitely long graphene ribbons. The electronic structure is calculated with the standard one-orbital tight-binding model and the linear conductance is obtained using the Landauer formula. We find that, since the zero-bias current is carried in the bulk of the ribbon, this is very robust with respect to a variety of constriction geometries and edge defects. In contrast, the curve of zero-bias conductance versus gate voltage departs from the $(2n+1) e^2/h$ staircase of the ideal case as soon as a single atom is removed from the sample. We also find that wedge-shaped constrictions can present non-conducting states fully localized in the constriction close to the Fermi energy. The interest of these localized states in regards the formation of quantum dots in graphene is discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2006-08-31T14:01:12.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "graphene nanoconstrictions",
      "zig-zag-edged infinitely long graphene ribbons",
      "ideal zig-zag-edged infinitely long graphene",
      "coherent transport properties",
      "gate voltage departs"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}