{
  "id": "0805.0454",
  "version": "v1",
  "published": "2008-05-05T02:52:25.000Z",
  "updated": "2008-05-05T02:52:25.000Z",
  "title": "Tuning of energy levels and optical properties of graphene quantum dots",
  "authors": [
    "Z. Z. Zhang",
    "Kai Chang",
    "F. M. Peeters"
  ],
  "comment": "5 pages, 7 figures. to appear in Phys. Rev. B",
  "doi": "10.1103/PhysRevB.77.235411",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We investigate theoretically the magnetic levels and optical properties of zigzag- and armchair-edged hexagonal graphene quantum dots (GQDs) utilizing the tight-binding method. A new bound edge state at zero energy appears for the zigzag GQDs in the absence of a magnetic field. The magnetic levels of GQDs exhibit a Hofstadter-butterfly spectrum and approach the Landau levels of two-dimensional graphene as the magnetic field increases. The optical properties are tuned by the size, the type of the edge, and the external magnetic field.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2008-05-05T02:52:25.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.22.-f",
      "78.67.-n",
      "75.75.+a",
      "81.07.Nb"
    ],
    "keywords": [
      "optical properties",
      "energy levels",
      "armchair-edged hexagonal graphene quantum dots",
      "magnetic levels",
      "bound edge state"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2008,
      "month": "Jun",
      "volume": 77,
      "number": 23,
      "pages": 235411
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvB..77w5411Z"
    }
  }
}