{
  "id": "0901.3573",
  "version": "v1",
  "published": "2009-01-22T22:51:48.000Z",
  "updated": "2009-01-22T22:51:48.000Z",
  "title": "Origin of the 0.25-anomaly in the nonlinear conductance of a quantum point contact",
  "authors": [
    "S. Ihnatsenka",
    "I. V. Zozoulenko"
  ],
  "comment": "6 pages, 4 figures",
  "journal": "Phys. Rev. B 79, 235313 (2009)",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We calculate the non-linear conductance of a quantum point contact using the non-equilibrium Greens function technique within the Hartree approximation of spinless electrons. We quantitative reproduce the 0.25-anomaly in the differential conductance (i.e. the lowest plateau at 0.25-0.3*2e^2/h) as well as an upward bending of higher conductance half-integer plateaus seen in the experiments, and relate these features to the non-linear screening and pinning effects.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-01-22T22:51:48.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.23.Ad",
      "71.15.Mb",
      "71.70.Gm",
      "73.63.Rt"
    ],
    "keywords": [
      "quantum point contact",
      "nonlinear conductance",
      "higher conductance half-integer plateaus",
      "non-equilibrium greens function technique",
      "non-linear conductance"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "doi": "10.1103/PhysRevB.79.235313",
      "year": 2009,
      "month": "Jun",
      "volume": 79,
      "number": 23,
      "pages": 235313
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvB..79w5313I"
    }
  }
}