{
  "id": "0902.0811",
  "version": "v2",
  "published": "2009-02-04T22:08:16.000Z",
  "updated": "2009-08-17T21:16:07.000Z",
  "title": "Electron interferometry in quantum Hall regime: Aharonov-Bohm effect of interacting electrons",
  "authors": [
    "Ping V. Lin",
    "F. E. Camino",
    "V. J. Goldman"
  ],
  "comment": "10 pages, 4 Figs",
  "journal": "Phys. Rev. B 80, 125310 (2009)",
  "doi": "10.1103/PhysRevB.80.125310",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "An apparent h/fe Aharonov-Bohm flux period, where f is an integer, has been reported in coherent quantum Hall devices. Such sub-period is not expected for non-interacting electrons and thus is thought to result from interelectron Coulomb interaction. Here we report experiments in a Fabry-Perot interferometer comprised of two wide constrictions enclosing an electron island. By carefully tuning the constriction front gates, we find a regime where interference oscillations with period h/2e persist throughout the transition between the integer quantum Hall plateaus 2 and 3, including half-filling. In a large quantum Hall sample, a transition between integer plateaus occurs near half-filling, where the bulk of the sample becomes delocalized and thus dissipative bulk current flows between the counterpropagating edges (\"backscattering\"). In a quantum Hall constriction, where conductance is due to electron tunneling, a transition between forward- and back-scattering is expected near the half-filling. In our experiment, neither period nor amplitude of the oscillations show a discontinuity at half-filling, indicating that only one interference path exists throughout the transition. We also present experiments and an analysis of the front-gate dependence of the phase of the oscillations. The results point to a single physical mechanism of the observed conductance oscillations: Aharonov-Bohm interference of interacting electrons in quantum Hall regime.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2009-08-17T21:16:07.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.43.Fj",
      "71.10.Pm"
    ],
    "keywords": [
      "quantum hall regime",
      "interacting electrons",
      "electron interferometry",
      "aharonov-bohm effect",
      "apparent h/fe aharonov-bohm flux period"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2009,
      "month": "Sep",
      "volume": 80,
      "number": 12,
      "pages": 125310
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvB..80l5310L"
    }
  }
}