{
  "id": "0904.2117",
  "version": "v2",
  "published": "2009-04-14T13:15:32.000Z",
  "updated": "2009-10-30T15:00:53.000Z",
  "title": "Merging of Dirac points in a two-dimensional crystal",
  "authors": [
    "G. Montambaux",
    "F. Piechon",
    "J. -N. Fuchs",
    "M. O. Goerbig"
  ],
  "comment": "4 pages, 5 figures,",
  "journal": "Phys. Rev. B 80, 153412 (2009)",
  "doi": "10.1103/PhysRevB.80.153412",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.quant-gas"
  ],
  "abstract": "We study under which general conditions a pair of Dirac points in the electronic spectrum of a two-dimensional crystal may merge into a single one. The merging signals a topological transition between a semi-metallic phase and a band insulator. We derive a universal Hamiltonian that describes the physical properties of the transition, which is controlled by a single parameter, and analyze the Landau-level spectrum in its vicinity. This merging may be observed in the organic salt alpha-(BEDT-TTF)_2 I_3 or in an optical lattice of cold atoms simulating deformed graphene.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2009-10-30T15:00:53.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.61.Wp",
      "73.61.Ph",
      "73.43.-f"
    ],
    "keywords": [
      "two-dimensional crystal",
      "dirac points",
      "cold atoms simulating deformed graphene",
      "electronic spectrum",
      "organic salt"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2009,
      "month": "Oct",
      "volume": 80,
      "number": 15,
      "pages": 153412
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvB..80o3412M"
    }
  }
}