{
  "id": "cond-mat/0603581",
  "version": "v1",
  "published": "2006-03-22T14:19:33.000Z",
  "updated": "2006-03-22T14:19:33.000Z",
  "title": "Thermodynamic density of states of two-dimensional GaAs systems near the apparent metal-insulator transition",
  "authors": [
    "G. D. Allison",
    "E. A. Galaktionov",
    "A. K. Savchenko",
    "S. S. Safonov",
    "M. M. Fogler",
    "M. Y. Simmons",
    "D. A. Ritchie"
  ],
  "journal": "Phys. Rev. Lett. 96, 216407 (2006)",
  "doi": "10.1103/PhysRevLett.96.216407",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "We perform combined resistivity and compressibility studies of two-dimensional hole and electron systems which show the apparent metal-insulator transition - a crossover in the sign of dR/dT with changing density. No thermodynamic anomalies have been detected in the crossover region. Instead, despite a ten-fold difference in r_s, the compressibility of both electrons and holes is well described by the theory of nonlinear screening of the random potential. We show that the resistivity exhibits a scaling behavior near the percolation threshold found from analysis of the compressibility. Notably, the percolation transition occurs at a much lower density than the crossover.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2006-03-22T14:19:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "apparent metal-insulator transition",
      "two-dimensional gaas systems",
      "thermodynamic density",
      "percolation transition occurs",
      "compressibility studies"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}