{
  "id": "1110.4280",
  "version": "v2",
  "published": "2011-10-19T13:39:34.000Z",
  "updated": "2011-10-20T08:11:10.000Z",
  "title": "Topological quantum number and critical exponent from conductance fluctuations at the quantum Hall plateau transition",
  "authors": [
    "I. C. Fulga",
    "F. Hassler",
    "A. R. Akhmerov",
    "C. W. J. Beenakker"
  ],
  "comment": "6 pages, 9 figures",
  "journal": "Phys. Rev. B 84, 245447 (2011)",
  "doi": "10.1103/PhysRevB.84.245447",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "The conductance of a two-dimensional electron gas at the transition from one quantum Hall plateau to the next has sample-specific fluctuations as a function of magnetic field and Fermi energy. Here we identify a universal feature of these mesoscopic fluctuations in a Corbino geometry: The amplitude of the magnetoconductance oscillations has an e^2/h resonance in the transition region, signaling a change in the topological quantum number of the insulating bulk. This resonance provides a signed scaling variable for the critical exponent of the phase transition (distinct from existing positive definite scaling variables).",
  "revisions": [
    {
      "version": "v2",
      "updated": "2011-10-20T08:11:10.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.43.Nq",
      "73.23.-b",
      "73.40.Kp",
      "73.43.Qt"
    ],
    "keywords": [
      "quantum hall plateau transition",
      "topological quantum number",
      "critical exponent",
      "conductance fluctuations",
      "positive definite scaling variables"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2011,
      "month": "Dec",
      "volume": 84,
      "number": 24,
      "pages": 245447
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011PhRvB..84x5447F"
    }
  }
}