{
  "id": "cond-mat/0411053",
  "version": "v1",
  "published": "2004-11-02T10:25:49.000Z",
  "updated": "2004-11-02T10:25:49.000Z",
  "title": "Magnetic Moment Formation in Quantum Point Contacts",
  "authors": [
    "P. S. Cornaglia",
    "C. A. Balseiro",
    "M. Avignon"
  ],
  "comment": "7 pages, 2 figures",
  "journal": "Phys. Rev. B 71, 024432 (2005)",
  "doi": "10.1103/PhysRevB.71.024432",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "We study the formation of local magnetic moments in quantum point contacts. Using a Hubbard-like model to describe point contacts formed in a two dimensional system, we calculate the magnetic moment using the unrestricted Hartree approximation. We analyze different type of potentials to define the point contact, for a simple square potential we calculate a phase diagram in the parameter space (Coulomb repulsion - gate voltage). We also present an analytical calculation of the susceptibility to give explicit conditions for the occurrence of a local moment, we present a simple scaling argument to analyze how the stability of the magnetic moment depends on the point contact dimensions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-11-02T10:25:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum point contacts",
      "magnetic moment formation",
      "simple square potential",
      "local magnetic moments",
      "magnetic moment depends"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}