{
  "id": "0909.1403",
  "version": "v1",
  "published": "2009-09-08T06:29:46.000Z",
  "updated": "2009-09-08T06:29:46.000Z",
  "title": "Measurement of diffusion thermopower in the quantum Hall systems",
  "authors": [
    "K. Fujita",
    "A. Endo",
    "S. Katsumoto",
    "Y. Iye"
  ],
  "comment": "4 pages, 4 figures, EP2DS-18",
  "journal": "Physica E 42 (2010) 1030",
  "doi": "10.1016/j.physe.2009.10.032",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We have measured diffusion thermopower in a two-dimensional electron gas at low temperature ($T$=40 mK) in the field range 0 $<B<$ 3.4 T, by employing the current heating technique. A Hall bar device is designed for this purpose, which contains two crossing Hall bars, one for the measurement and the other used as a heater, and is equipped with a metallic front gate to control the resistivity of the areas to be heated. In the low magnetic field regime ($B\\leq$ 1 T), we obtain the transverse thermopower $S_{yx}$ that quantitatively agrees with the $S_{yx}$ calculated from resistivities using the generalized Mott formula. In the quantum Hall regime ($B\\geq$ 1T), we find that $S_{yx}$ signal appears only when both the measured and the heater area are in the resistive (inter-quantum Hall transition) region. Anomalous gate-voltage dependence is observed above $\\sim$1.8 T, where spin-splitting in the measured area becomes apparent.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-09-08T06:29:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum hall systems",
      "diffusion thermopower",
      "measurement",
      "low magnetic field regime",
      "metallic front gate"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Physica E Low-Dimensional Systems and Nanostructures",
      "year": 2010,
      "month": "Feb",
      "volume": 42,
      "number": 4,
      "pages": 1030
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhyE...42.1030F"
    }
  }
}