{
  "id": "0903.3091",
  "version": "v2",
  "published": "2009-03-18T05:23:48.000Z",
  "updated": "2009-07-24T16:33:52.000Z",
  "title": "Landau Levels and Quantum Hall Effect in Graphene Superlattices",
  "authors": [
    "Cheol-Hwan Park",
    "Young-Woo Son",
    "Li Yang",
    "Marvin L. Cohen",
    "Steven G. Louie"
  ],
  "comment": "7 pages, 7 figures",
  "journal": "Phys. Rev. Lett. 103, 046808 (2009)",
  "doi": "10.1103/PhysRevLett.103.046808",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We show that, when graphene is subjected to an appropriate one-dimensional external periodic potential, additional branches of massless fermions are generated with nearly the same electron-hole crossing energy as that at the original Dirac point of graphene. Because of these new zero-energy branches, the Landau levels at charge neutral filling becomes 4(2N+1)-fold degenerate (with N=0,1,2,..., tunable by the potential strength and periodicity) with the corresponding Hall conductivity $\\sigma_{xy}$ showing a step of size 4(2N+1)$e^2/h$. These theoretical findings are robust against variations in the details of the external potential and provide measurable signatures of the unusual electronic structure of graphene superlattices.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2009-07-24T16:33:52.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum hall effect",
      "graphene superlattices",
      "landau levels",
      "appropriate one-dimensional external periodic potential",
      "original dirac point"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009arXiv0903.3091P"
    }
  }
}