{
  "id": "1109.1491",
  "version": "v1",
  "published": "2011-09-07T15:38:07.000Z",
  "updated": "2011-09-07T15:38:07.000Z",
  "title": "Evolution of the 7/2 fractional quantum Hall state in two-subband systems",
  "authors": [
    "Yang Liu",
    "J. Shabani",
    "D. Kamburov",
    "M. Shayegan",
    "L. N. Pfeiffer",
    "K. W. West",
    "K. W. Baldwin"
  ],
  "journal": "PRL. 107. 266802 (2011)",
  "doi": "10.1103/PhysRevLett.107.266802",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We report the evolution of the fractional quantum Hall state (FQHS) at even-denominator filling factor $\\nu=7/2$ in wide GaAs quantum wells in which electrons occupy two electric subbands. The data reveal subtle and distinct evolutions as a function of density, magnetic field tilt-angle, or symmetry of the charge distribution. When the charge distribution is strongly asymmetric, there is a remarkable persistence of a resistance minimum near $\\nu=7/2$ when two Landau levels belonging to the two subbands cross at the Fermi energy. The field position of this minimum tracks the 5/2 filling of the symmetric subband, suggesting a pinning of the crossing levels and a developing 5/2 FQHS in the symmetric subband even when the antisymmetric level is partially filled.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-09-07T15:38:07.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.43.Qt",
      "73.63.Hs"
    ],
    "keywords": [
      "fractional quantum hall state",
      "two-subband systems",
      "symmetric subband",
      "charge distribution",
      "wide gaas quantum wells"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2011,
      "month": "Dec",
      "volume": 107,
      "number": 26,
      "pages": 266802
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011PhRvL.107z6802L"
    }
  }
}