{
  "id": "cond-mat/0111504",
  "version": "v1",
  "published": "2001-11-27T09:06:28.000Z",
  "updated": "2001-11-27T09:06:28.000Z",
  "title": "Comment on \"Effects of Disorder on Ferromagnetism in Diluted Magnetic Semiconductors\"",
  "authors": [
    "C. Timm",
    "F. Schäfer",
    "F. von Oppen"
  ],
  "comment": "2 pages RevTeX, including 1 figure",
  "categories": [
    "cond-mat.dis-nn",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "In a recent Letter, Berciu and Bhatt have presented a mean-field theory of ferromagnetism in III-V semiconductors doped with manganese, starting from an impurity band model. We show that this approach gives an unphysically broad impurity band and is thus not appropriate for (Ga,Mn)As containing 1-5% Mn. We also point out a microscopically unmotivated sign change in the overlap integrals in the Letter. Without this sign change, stable ferromagnetism is not obtained.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2001-11-27T09:06:28.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "diluted magnetic semiconductors",
      "ferromagnetism",
      "impurity band model",
      "unphysically broad impurity band",
      "mean-field theory"
    ],
    "note": {
      "typesetting": "RevTeX",
      "pages": 2,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2001cond.mat.11504T"
    }
  }
}