{
  "id": "1005.3764",
  "version": "v3",
  "published": "2010-05-20T17:24:16.000Z",
  "updated": "2010-07-09T16:02:58.000Z",
  "title": "Zero-bias Anomaly of Quantum Point Contacts in the Low-Conductance Limit",
  "authors": [
    "Y. Ren",
    "W. W. Yu",
    "S. M. Frolov",
    "J. A. Folk",
    "W. Wegscheider"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Most quantum point contacts (QPCs) fabricated in high-mobility 2D electron gases show a zero-bias conductance peak near pinchoff, but the origin of this peak remains a mystery. Previous experiments have primarily focused on the zero-bias peak at moderate conductance, in the range (1-2)e^2/h. Here, measurements are presented of zero-bias peaks that persist down to 10^{-4}e^2/h. Magnetic field and temperature dependencies of the zero-bias peak in the low-conductance limit are qualitatively different from the analogous phenomenology at higher conductance, with implications for existing theoretical models of transport in low-density QPCs.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2010-07-09T16:02:58.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.63.Nm",
      "72.10.Fk",
      "73.23.Ad"
    ],
    "keywords": [
      "quantum point contacts",
      "low-conductance limit",
      "zero-bias peak",
      "zero-bias anomaly",
      "high-mobility 2d electron gases"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.82.045313",
      "journal": "Physical Review B",
      "year": 2010,
      "month": "Jul",
      "volume": 82,
      "number": 4,
      "pages": "045313"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhRvB..82d5313R"
    }
  }
}