{
  "id": "0906.0445",
  "version": "v1",
  "published": "2009-06-02T10:56:34.000Z",
  "updated": "2009-06-02T10:56:34.000Z",
  "title": "Highly enhanced thermopower in two-dimensional electron systems at milliKelvin temperatures",
  "authors": [
    "Srijit Goswami",
    "Christoph Siegert",
    "Matthias Baenninger",
    "Arindam Ghosh",
    "Michael Pepper",
    "Ian Farrer",
    "David A. Ritchie"
  ],
  "comment": "(to appear in Phys. Rev. Lett.)",
  "journal": "Phys. Rev. Lett., 103, 026602 (2009)",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We report experimental observation of an unexpectedly large thermopower in mesoscopic two-dimensional (2D) electron systems on GaAs/AlGaAs heterostructures at sub-Kelvin temperatures and zero magnetic field. Unlike conventional non-magnetic high-mobility 2D systems, the thermopower in our devices increases with decreasing temperature below 0.3 K, reaching values in excess of 100 $\\mu$V/K, thus exceeding the free electron estimate by more than two orders of magnitude. With support from a parallel independent study of the local density of states, we suggest such a phenomenon to be linked to intrinsic localized states and many-body spin correlations in the system.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-06-02T10:56:34.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "72.20.Pa",
      "72.25.-b",
      "75.30.Mb"
    ],
    "keywords": [
      "two-dimensional electron systems",
      "highly enhanced thermopower",
      "millikelvin temperatures",
      "conventional non-magnetic high-mobility 2d systems",
      "unlike conventional non-magnetic high-mobility 2d"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "doi": "10.1103/PhysRevLett.103.026602",
      "year": 2009,
      "month": "Jul",
      "volume": 103,
      "number": 2,
      "pages": "026602"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvL.103b6602G"
    }
  }
}