{
  "id": "1206.0757",
  "version": "v2",
  "published": "2012-06-04T20:31:22.000Z",
  "updated": "2013-01-31T11:06:50.000Z",
  "title": "Ergodic vs diffusive decoherence in mesoscopic devices",
  "authors": [
    "Thibaut Capron",
    "Christophe Texier",
    "Gilles Montambaux",
    "Dominique Mailly",
    "Andreas D. Wieck",
    "Laurent Saminadayar"
  ],
  "comment": "LaTeX, 5 pages, 4 pdf figures ; v2: revised version",
  "journal": "Phys. Rev. B 87, 041307(R) (2013)",
  "doi": "10.1103/PhysRevB.87.041307",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.dis-nn"
  ],
  "abstract": "We report on the measurement of phase coherence length in a high mobility two-dimensional electron gas patterned in two different geometries, a wire and a ring. The phase coherence length is extracted both from the weak localization correction in long wires and from the amplitude of the Aharonov-Bohm oscillations in a single ring, in a low temperature regime when decoherence is dominated by electronic interactions. We show that these two measurements lead to different phase coherence lengths, namely $L_{\\Phi}^\\mathrm{wire}\\propto T^{-1/3}$ and $L_{\\Phi}^\\mathrm{ring}\\propto T^{-1/2}$. This difference reflects the fact that the electrons winding around the ring necessarily explore the whole sample (ergodic trajectories), while in a long wire the electrons lose their phase coherence before reaching the edges of the sample (diffusive regime).",
  "revisions": [
    {
      "version": "v2",
      "updated": "2013-01-31T11:06:50.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.23.-b",
      "03.65.Ta",
      "75.20.Hr",
      "72.70.+m"
    ],
    "keywords": [
      "phase coherence length",
      "mesoscopic devices",
      "diffusive decoherence",
      "high mobility two-dimensional electron gas"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2013,
      "month": "Jan",
      "volume": 87,
      "number": 4,
      "pages": "041307"
    },
    "note": {
      "typesetting": "PDFLaTeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvB..87d1307C"
    }
  }
}