{
  "id": "1203.6421",
  "version": "v1",
  "published": "2012-03-29T03:51:57.000Z",
  "updated": "2012-03-29T03:51:57.000Z",
  "title": "Enhancement of the $ν= 5/2$ Fractional Quantum Hall State in a Small In-Plane Magnetic Field",
  "authors": [
    "Guangtong Liu",
    "Chi Zhang",
    "D. C. Tsui",
    "Ivan Knez",
    "Aaron Levine",
    "R. R. Du",
    "L. N. Pfeiffer",
    "K. W. West"
  ],
  "comment": "5+ pages, 3 figures, accepted for by Phy. Rev. Lett",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Using a 50-nm width, ultra-clean GaAs/AlGaAs quantum well, we have studied the Landau level filling factor $\\nu = 5/2$ fractional quantum Hall effect in a perpendicular magnetic field $B \\sim$ 1.7 T and determined its dependence on tilted magnetic fields. Contrary to all previous results, the 5/2 resistance minimum and the Hall plateau are found to strengthen continuously under an increasing tilt angle $0 < \\theta < 25^\\circ$ (corresponding to an in-plane magnetic field 0 $<$ $B_\\parallel$ $< 0.8$ T). In the same range of $\\theta$ the activation gaps of both the 7/3 and the 8/3 states are found to increase with tilt. The 5/2 state transforms into a compressible Fermi liquid upon tilt angle $\\theta > 60^\\circ$, and the composite fermion series [2+$p/(2p\\pm1)$], $p =$ 1, 2 can be identified. Based on our results, we discuss the relevance of a Skyrmion spin texture at $\\nu = 5/2$ associated with small Zeeman energy in wide quantum wells, as proposed by W$\\acute{\\text o}$js $et$ $al$., Phys. Rev. Lett. 104, 086801 (2010).",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-03-29T03:51:57.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.43.-f",
      "73.21.-b"
    ],
    "keywords": [
      "fractional quantum hall state",
      "small in-plane magnetic field",
      "tilt angle",
      "enhancement",
      "fractional quantum hall effect"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevLett.108.196805",
      "journal": "Physical Review Letters",
      "year": 2012,
      "month": "May",
      "volume": 108,
      "number": 19,
      "pages": 196805
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvL.108s6805L"
    }
  }
}