{
  "id": "cond-mat/0209309",
  "version": "v2",
  "published": "2002-09-13T15:39:05.000Z",
  "updated": "2003-05-05T13:38:33.000Z",
  "title": "Localization Length in Anderson Insulator with Kondo Impurities",
  "authors": [
    "S. Kettemann",
    "M. E. Raikh"
  ],
  "comment": "5 pages, 1 figure",
  "journal": "Phys. Rev. Lett. 90, 146601 (2003)",
  "doi": "10.1103/PhysRevLett.90.146601",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.dis-nn",
    "cond-mat.str-el"
  ],
  "abstract": "The localization length, $\\xi$, in a 2--dimensional Anderson insulator depends on the electron spin scattering rate by magnetic impurities, $\\tau_s^{-1}$. For antiferromagnetic sign of the exchange, %constant, the time $\\tau_s$ is {\\em itself a function of $\\xi$}, due to the Kondo correlations. We demonstrate that the unitary regime of localization is impossible when the concentration of magnetic impurities, $n_{\\tiny M}$, is smaller than a critical value, $n_c$. For $n_{\\tiny M}>n_c$, the dependence of $\\xi$ on the dimensionless conductance, $g$, is {\\em reentrant}, crossing over to unitary, and back to orthogonal behavior upon increasing $g$. Sensitivity of Kondo correlations to a weak {\\em parallel} magnetic field results in a giant parallel magnetoresistance.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2003-05-05T13:38:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "localization length",
      "kondo impurities",
      "kondo correlations",
      "magnetic impurities",
      "magnetic field results"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}