{
  "id": "0709.4181",
  "version": "v2",
  "published": "2007-09-26T14:42:20.000Z",
  "updated": "2008-04-04T18:06:55.000Z",
  "title": "Violation of the Wiedemann-Franz Law in a Single-Electron Transistor",
  "authors": [
    "Björn Kubala",
    "Jürgen König",
    "J. P. Pekola"
  ],
  "comment": "published version, minor changes; 4 pages, 3 figures",
  "journal": "Phys. Rev. Lett. 100, 066801 (2008)",
  "doi": "10.1103/PhysRevLett.100.066801",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We study the influence of Coulomb interaction on the thermoelectric transport coefficients for a metallic single-electron transistor. By performing a perturbation expansion up to second order in the tunnel-barrier conductance, we include sequential and cotunneling processes as well as quantum fluctuations that renormalize the charging energy and the tunnel conductance. We find that Coulomb interaction leads to a strong violation of the Wiedemann-Franz law: the Lorenz ratio becomes gate-voltage dependent for sequential tunneling, and is increased by a factor 9/5 in the cotunneling regime. Finally, we suggest a measurement scheme for an experimental realization.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2008-04-04T18:06:55.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.23.Hk",
      "73.50.Lw",
      "85.80.Fi"
    ],
    "keywords": [
      "wiedemann-franz law",
      "coulomb interaction",
      "thermoelectric transport coefficients",
      "metallic single-electron transistor",
      "tunnel-barrier conductance"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2008,
      "month": "Feb",
      "volume": 100,
      "number": 6,
      "pages": "066801"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvL.100f6801K"
    }
  }
}