{
  "id": "0801.3312",
  "version": "v2",
  "published": "2008-01-22T06:54:48.000Z",
  "updated": "2008-01-30T18:53:11.000Z",
  "title": "Intrinsic Gap of the nu=5/2 Fractional Quantum Hall State",
  "authors": [
    "C. R. Dean",
    "B. A. Piot",
    "P. Hayden",
    "S. Das Sarma",
    "G. Gervais",
    "L. N. Pfeiffer",
    "K. W. West"
  ],
  "comment": "5 pages, 4 figures; typo corrected, comment expanded",
  "journal": "Phys. Rev. Lett. 100, 146803 (2008)",
  "doi": "10.1103/PhysRevLett.100.146803",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "The fractional quantum Hall effect is observed at low field, in a regime where the cyclotron energy is smaller than the Coulomb interaction. The nu=5/2 excitation gap is measured to be 262+/-15 mK at ~2.6 T, in good agreement with previous measurements performed on samples with similar mobility, but with electronic density larger by a factor of two. The role of disorder on the nu=5/2 gap is examined. Comparison between experiment and theory indicates that a large discrepancy remains for the intrinsic gap extrapolated from the infinite mobility (zero disorder) limit. In contrast, no such large discrepancy is found for the nu=1/3 Laughlin state. The observation of the nu=5/2 state in the low-field regime implies that inclusion of non-perturbative Landau level mixing may be necessary to better understand the energetics of half-filled fractional quantum hall liquids.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2008-01-30T18:53:11.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.43.-f",
      "03.67.-a",
      "73.63.Hs"
    ],
    "keywords": [
      "fractional quantum hall state",
      "intrinsic gap",
      "half-filled fractional quantum hall liquids",
      "fractional quantum hall effect",
      "low-field regime implies"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2008,
      "month": "Apr",
      "volume": 100,
      "number": 14,
      "pages": 146803
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvL.100n6803D"
    }
  }
}