{
  "id": "cond-mat/0504099",
  "version": "v1",
  "published": "2005-04-05T20:00:04.000Z",
  "updated": "2005-04-05T20:00:04.000Z",
  "title": "Composite fermions close to the one-half filling of the lowest Landau level revisited",
  "authors": [
    "Behnam Farid"
  ],
  "comment": "5 pages, 2 postscript figures",
  "journal": "Int. J. Mod. Phys. B, Vol. 19, No. 4, 775-782 (2005)",
  "doi": "10.1142/S021797920502772X",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "By strictly adhering to the microscopic theory of composite fermions for the Landau-level filling fractions nu_e = p/(2 p + 1), we reproduce, with remarkable accuracy, the surface-acoustic-wave (SAW)-based experimental results by Willett and co-workers concerning two-dimensional electron systems with nu_e close to 1/2. Our results imply that the electron band mass m_b, as distinct from the composite fermion mass m_*, must undergo a substantial increase under the conditions corresponding to nu_e approximately equal to 1/2. In view of the relatively low aerial electronic densities n_e to which the underlying SAW experiments correspond, our finding conforms with the experimental results by Shashkin et al. [Phys. Rev. B 66, 073303 (2002)], concerning two-dimensional electrons in silicon, that signal sharp increase in m_b for n_e decreasing below approximately 2 x 10^{11} cm^{-2}. We further establish that a finite mean-free path l_0 is essential for the observed linearity of the longitudinal conductivity sigma_{xx}(q) as deduced from the SAW velocity shifts.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2005-04-05T20:00:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "lowest landau level",
      "composite fermions close",
      "low aerial electronic densities",
      "concerning two-dimensional electron systems",
      "one-half filling"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}