{
  "id": "0712.3233",
  "version": "v3",
  "published": "2007-12-19T16:55:05.000Z",
  "updated": "2008-04-17T20:26:23.000Z",
  "title": "Theory of the valley-valve effect in graphene nanoribbons",
  "authors": [
    "A. R. Akhmerov",
    "J. H. Bardarson",
    "A. Rycerz",
    "C. W. J. Beenakker"
  ],
  "comment": "5 pages, 6 figures, v3 added more numerical data and an appendix with details of the calculation",
  "journal": "Phys. Rev. B vol. 77, 205416, 2008",
  "doi": "10.1103/PhysRevB.77.205416",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "A potential step in a graphene nanoribbon with zigzag edges is shown to be an intrinsic source of intervalley scattering -- no matter how smooth the step is on the scale of the lattice constant a. The valleys are coupled by a pair of localized states at the opposite edges, which act as an attractor/repellor for edge states propagating in valley K/K'. The relative displacement Delta along the ribbon of the localized states determines the conductance G. Our result G=(e^{2}/h)[1-\\cos(N\\pi+2\\pi\\Delta/3a)] explains why the ``valley-valve'' effect (the blocking of the current by a p-n junction) depends on the parity of the number N of carbon atoms across the ribbon.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2008-04-17T20:26:23.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.20.Fz",
      "73.23.-b",
      "73.40.Gk",
      "73.63.Nm"
    ],
    "keywords": [
      "graphene nanoribbon",
      "valley-valve effect",
      "lattice constant",
      "carbon atoms",
      "potential step"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2008,
      "month": "May",
      "volume": 77,
      "number": 20,
      "pages": 205416
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvB..77t5416A"
    }
  }
}