{
  "id": "cond-mat/0008356",
  "version": "v1",
  "published": "2000-08-24T12:23:43.000Z",
  "updated": "2000-08-24T12:23:43.000Z",
  "title": "Nonlinearity of Acoustic Effects and High-Frequency Electrical Conductivity in GaAs/AlGaAs Heterostructures under Conditions of the Integer Quantum Hall Effect",
  "authors": [
    "I. L. Drichko",
    "A. M. Diakonov",
    "I. Yu. Smirnov",
    "A. I. Toropov"
  ],
  "comment": "RevTeX; 7 pages + 5 eps figs",
  "journal": "Semiconductors 34, 436 (2000)",
  "doi": "10.1134/1.1188000",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "The absorption coefficient for surface acoustic wave $\\Gamma$ and variation in the wave velocity $\\Delta V/V$ were measured in GaAs/AlGaAs heterostructures; the above quantities are related to interaction of the wave with two-dimensional electron gas and depend nonlinearly on the power of the wave. Measurements were performed under conditions of the integer quantum Hall effect (IQHE), in which case the two-dimensional electron gas was localized in a random fluctuation potential of impurities. The dependences of the components $\\sigma_1(E)$ and $\\sigma_2(E)$ of high-frequency conductivity $\\sigma=\\sigma_1 - i\\sigma_2$ on the electric field of the surface wave were determined. In the range of the conductivity obeying the Arrhenius law ($\\sigma_1 \\gg \\sigma_2$), the results obtained are interpreted in terms of the Shklovskii theory of nonlinear percolation-based conductivity, which makes it possible to estimate the magnitude of the fluctuation potential of impurities. The dependences $\\sigma_1(E)$ and $\\sigma_2(E)$ in the range of high-frequency hopping electrical conductivity, in which case ($\\sigma_1 \\ll \\sigma_2$) and the theory of nonlinearities has not been yet developed, are reported.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-08-24T12:23:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "integer quantum hall effect",
      "high-frequency electrical conductivity",
      "gaas/algaas heterostructures",
      "acoustic effects",
      "two-dimensional electron gas"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "RevTeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}