{
  "id": "cond-mat/9701101",
  "version": "v1",
  "published": "1997-01-15T08:50:38.000Z",
  "updated": "1997-01-15T08:50:38.000Z",
  "title": "Universality and Phase Diagram around Half-filled Landau Level",
  "authors": [
    "L. W. Wong",
    "H. W. Jiang",
    "W. J. Schaff"
  ],
  "comment": "7 pages (Revtex), 5 figures",
  "journal": "Phys. Rev. B54 Rapid Communication, 17323 (1996)",
  "doi": "10.1103/PhysRevB.54.R17323",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Gated GaAs/AlGaAs heterostructures were used to determine the low-temperature behavior of the two-dimensional electron gas near filling factor nu=1/2 in the disorder-magnetic-field plane. We identify a line on which sigma_{xy} is temperature independent, has value sigma_{xy}=0.5 (e^{2}/h), and a distinct line on which rho_{xy}=2 (h/e^{2}). The phase boundaries between the Hall insulator and the principal quantum Hall liquids at nu=1 and 1/3 show levitation of the delocalized states of the first Landau levels for electrons and composite fermions. Finally, the data suggest that there is no true metallic phase around nu=1/2.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1997-01-15T08:50:38.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "half-filled landau level",
      "phase diagram",
      "principal quantum hall liquids",
      "universality",
      "true metallic phase"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "RevTeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}