{
  "id": "cond-mat/9709202",
  "version": "v1",
  "published": "1997-09-18T12:14:10.000Z",
  "updated": "1997-09-18T12:14:10.000Z",
  "title": "Coulomb drag in the quantum Hall $ν= 1/2$ state: Role of disorder",
  "authors": [
    "Ady Stern",
    "Iddo Ussishkin"
  ],
  "comment": "RevTeX, 8 pages, 1 figure. This work discusses the role of disorder, which was not discussed in our cond-mat/9701135. To appear in Physica E, in the proceedings of the conference on Novel Physics in Low-Dimensional Electron Systems, Dresden 1997",
  "journal": "Physica E 1 (1997) 176",
  "doi": "10.1016/S1386-9477(97)00038-6",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We consider Coulomb drag between two layers of two-dimensional electron gases subject to a strong magnetic field, with the Landau level filling factor in each layer being 1/2. We find $\\rho_D$ to be very large, as compared to the zero magnetic field case. We attribute this enhancement to the slow decay of density fluctuations in a strong magnetic field. For a clean system, the linear $q$-dependence of the longitudinal conductivity, characteristic of the $\\nu=1/2$ state, leads a unique temperature dependence---$\\rd \\propto T^{4/3}$. Within a semiclassical approximation, disorder leads to a decrease of the transresistivity as compared with the clean case, and a temperature dependence of $T^2\\log T$ at low temperatures.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1997-09-18T12:14:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "coulomb drag",
      "quantum hall",
      "strong magnetic field",
      "zero magnetic field case",
      "two-dimensional electron gases subject"
    ],
    "tags": [
      "conference paper",
      "journal article"
    ],
    "note": {
      "typesetting": "RevTeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}