{
  "id": "cond-mat/0507159",
  "version": "v2",
  "published": "2005-07-07T07:05:24.000Z",
  "updated": "2006-02-24T04:31:26.000Z",
  "title": "Conservation of spin current",
  "authors": [
    "Jian Wang",
    "Baigeng Wang",
    "Wei Ren",
    "Hong Guo"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "The conventional definition of spin-current, namely spin density multiplied by the group velocity, is not a conserved quantity due to possible spin rotations caused by spin-orbit (SO) interaction. However, in a model with spin-spin interactions, rotation of a spin causes a dynamic response of surrounding spins that opposes the rotation. Such a many-body effect restores the spin-current conservation. Here we prove that the non-conservation problem of spin-current can be resolved if a self-consistent spin-spin interaction is included in the analysis. We further derive a spin-conductance formula which partitions spin-current into different leads of a multi-lead conductor.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2006-02-24T04:31:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "spin current",
      "many-body effect restores",
      "self-consistent spin-spin interaction",
      "non-conservation problem",
      "conventional definition"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2005cond.mat..7159W"
    }
  }
}