{
  "id": "0910.4575",
  "version": "v2",
  "published": "2009-10-23T19:41:42.000Z",
  "updated": "2010-02-17T17:25:01.000Z",
  "title": "Interaction-induced shift of the cyclotron resonance of graphene using infrared spectroscopy",
  "authors": [
    "E. A. Henriksen",
    "P. Cadden-Zimansky",
    "Z. Jiang",
    "Z. Q. Li",
    "L. -C. Tung",
    "M. E. Schwartz",
    "M. Takita",
    "Y. -J. Wang",
    "P. Kim",
    "H. L. Stormer"
  ],
  "comment": "4 pages, 4 figures. Version 2, edited for publication. Includes a number of edits for clarity; also added a paragraph contrasting our work w/ previous CR expts. in 2D Si and GaAs",
  "journal": "PRL 104, 067404 (2010)",
  "doi": "10.1103/PhysRevLett.104.067404",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We report a study of the cyclotron resonance (CR) transitions to and from the unusual $n=0$ Landau level (LL) in monolayer graphene. Unexpectedly, we find the CR transition energy exhibits large (up to 10%) and non-monotonic shifts as a function of the LL filling factor, with the energy being largest at half-filling of the $n=0$ level. The magnitude of these shifts, and their magnetic field dependence, suggests that an interaction-enhanced energy gap opens in the $n=0$ level at high magnetic fields. Such interaction effects normally have limited impact on the CR due to Kohn's theorem [W. Kohn, Phys. Rev. {\\bf 123}, 1242 (1961)], which does not apply in graphene as a consequence of the underlying linear band structure.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2010-02-17T17:25:01.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "78.30.Na",
      "71.70.Di",
      "76.40.+b",
      "78.66.Tr"
    ],
    "keywords": [
      "cyclotron resonance",
      "infrared spectroscopy",
      "interaction-induced shift",
      "interaction-enhanced energy gap opens",
      "underlying linear band structure"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2010,
      "month": "Feb",
      "volume": 104,
      "number": 6,
      "pages": "067404"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhRvL.104f7404H"
    }
  }
}