{
  "id": "cond-mat/0407529",
  "version": "v2",
  "published": "2004-07-20T15:54:59.000Z",
  "updated": "2004-09-02T15:32:43.000Z",
  "title": "Interplay between the mesoscopic Stoner and Kondo effects in quantum dots",
  "authors": [
    "Ganpathy Murthy"
  ],
  "comment": "4 pages, 2 eps figures. Revised version contains comments on the subtleties of the large-N approach to the Kondo problem, and the possibility of a smooth crossover instead of a transition. Three references added. Figures unchanged",
  "doi": "10.1103/PhysRevLett.94.126803",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We consider electrons confined to a quantum dot interacting antiferromagnetically with a spin-$\\half$ Kondo impurity. The electrons also interact among themselves ferromagnetically with a dimensionless coupling $\\tilde{J}$, where $\\tilde{J}=1$ denotes the bulk Stoner transition. We show that as $\\tilde{J}$ approaches 1 there is a regime with enhanced Kondo correlations, followed by one where the Kondo effect is destroyed and impurity is spin polarized opposite to the dot electrons. The most striking signature of the first, Stoner-enhanced Kondo regime, is that a Zeeman field increases the Kondo scale, in contrast to the case for noninteracting dot electrons. Implications for experiments are discussed.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2004-09-02T15:32:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "kondo effect",
      "quantum dot",
      "mesoscopic stoner",
      "dot electrons",
      "bulk stoner transition"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}