{
  "id": "1202.2952",
  "version": "v3",
  "published": "2012-02-14T07:12:01.000Z",
  "updated": "2012-08-22T11:15:54.000Z",
  "title": "Influence of e-e scattering on the temperature dependence of the resistance of a classical ballistic point contact in a two-dimensional electron system",
  "authors": [
    "M. Yu. Melnikov",
    "J. P. Kotthaus",
    "V. Pellegrini",
    "L. Sorba",
    "G. Biasiol",
    "V. S. Khrapai"
  ],
  "comment": "as published",
  "journal": "Phys. Rev. B 86, 075425 (2012)",
  "doi": "10.1103/PhysRevB.86.075425",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We experimentally investigate the temperature (T) dependence of the resistance of a classical ballistic point contact (PC) in a two-dimensional electron system (2DES). The split-gate PC is realized in a high-quality AlGaAs/GaAs heterostructure. The PC resistance is found to drop by more than 10% as T is raised from 0.5 K to 4.2 K. In the absence of a magnetic field, the T dependence is roughly linear below 2 K and tends to saturate at higher T. Perpendicular magnetic fields on the order of a few 10 mT suppress the T-dependent contribution dR. This effect is more pronounced at lower temperatures, causing a crossover to a nearly parabolic T dependence in a magnetic field. The normalized magnetic field dependencies dR(B) permit an empiric single parameter scaling in a wide range of PC gate voltages. These observations give strong evidence for the influence of electron-electron (e-e) scattering on the resistance of ballistic PCs. Our results are in qualitative agreement with a recent theory of the e-e scattering based T dependence of the conductance of classical ballistic PCs [ Phys. Rev. Lett. 101 216807 (2008) and Phys. Rev. B 81 125316 (2010)].",
  "revisions": [
    {
      "version": "v3",
      "updated": "2012-08-22T11:15:54.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.23.-b",
      "73.23.Ad"
    ],
    "keywords": [
      "classical ballistic point contact",
      "two-dimensional electron system",
      "temperature dependence",
      "magnetic field dependencies dr",
      "e-e scattering"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2012,
      "month": "Aug",
      "volume": 86,
      "number": 7,
      "pages": "075425"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvB..86g5425M"
    }
  }
}