{
  "id": "cond-mat/0405312",
  "version": "v2",
  "published": "2004-05-14T08:59:52.000Z",
  "updated": "2004-11-16T10:10:46.000Z",
  "title": "What are spin currents in Heisenberg magnets?",
  "authors": [
    "Florian Schuetz",
    "Peter Kopietz",
    "Marcus Kollar"
  ],
  "comment": "4 pages, 1 figure, published version",
  "journal": "Eur. Phys. J. B 41, 557 (2004)",
  "doi": "10.1140/epjb/e2004-00348-9",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "We discuss the proper definition of the spin current operator in Heisenberg magnets subject to inhomogeneous magnetic fields. We argue that only the component of the naive \"current operator\" J_ij S_i x S_j in the plane spanned by the local order parameters <S_i> and <S_j> is related to real transport of magnetization. Within a mean field approximation or in the classical ground state the spin current therefore vanishes. Thus, finite spin currents are a direct manifestation of quantum correlations in the system.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2004-11-16T10:10:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "local order parameters",
      "mean field approximation",
      "heisenberg magnets subject",
      "spin current operator",
      "finite spin currents"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}