{
  "id": "1401.7605",
  "version": "v1",
  "published": "2014-01-29T17:38:37.000Z",
  "updated": "2014-01-29T17:38:37.000Z",
  "title": "Fractional Quantum Hall Effect at $ν=1/2$ in Hole Systems Confined to GaAs Quantum Wells",
  "authors": [
    "Yang Liu",
    "A. L. Graninger",
    "S. Hasdemir",
    "M. Shayegan",
    "L. N. Pfeiffer",
    "K. W. West",
    "K. W. Baldwin",
    "R. Winkler"
  ],
  "journal": "Phys. Rev. Lett. 112, 046804 (2014)",
  "doi": "10.1103/PhysRevLett.112.046804",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "We observe fractional quantum Hall effect (FQHE) at the even-denominator Landau level filling factor $\\nu=1/2$ in two-dimensional hole systems confined to GaAs quantum wells of width 30 to 50 nm and having bilayer-like charge distributions. The $\\nu=1/2$ FQHE is stable when the charge distribution is symmetric and only in a range of intermediate densities, qualitatively similar to what is seen in two-dimensional electron systems confined to approximately twice wider GaAs quantum wells. Despite the complexity of the hole Landau level structure, originating from the coexistence and mixing of the heavy- and light-hole states, we find the hole $\\nu=1/2$ FQHE to be consistent with a two-component, Halperin-Laughlin ($\\Psi_{331}$) state.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-01-29T17:38:37.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.43.Fj",
      "73.21.Fg",
      "73.43.Nq",
      "73.43.Qt"
    ],
    "keywords": [
      "fractional quantum hall effect",
      "hole systems",
      "twice wider gaas quantum",
      "wider gaas quantum wells",
      "landau level filling factor"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2014,
      "month": "Jan",
      "volume": 112,
      "number": 4,
      "pages": "046804"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014PhRvL.112d6804L"
    }
  }
}