{
  "id": "1907.11931",
  "version": "v1",
  "published": "2019-07-27T14:59:19.000Z",
  "updated": "2019-07-27T14:59:19.000Z",
  "title": "Magnetization plateau of the $S=2$ antiferromagnetic Heisenberg chain with anisotropies",
  "authors": [
    "Tôru Sakai",
    "Kiyomi Okamoto",
    "Takashi Tonegawa"
  ],
  "comment": "to be published in Phys. Rev. B",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "We investigate the $S=2$ antiferromagnetic quantum spin chain with the exchange and single-ion anisotropies in a magnetic field, using the numerical exact diagonalization of finite-size clusters and the level spectroscopy analysis. It is found that a magnetization plateau possibly appears at a half of the saturation magnetization for some suitable anisotropy parameters. The level spectroscopy analysis indicates that the 1/2 magnetization plateau is formed by two different mechanisms, depending on the anisotropy parameters. The phase diagram of the 1/2 plateau states and some typical magnetization curves are also presented. In addition the biquadratic interaction is revealed to enhance the plateau induced by the Haldane mechanism.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-07-27T14:59:19.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "antiferromagnetic heisenberg chain",
      "level spectroscopy analysis",
      "anisotropy parameters",
      "antiferromagnetic quantum spin chain",
      "magnetization plateau possibly appears"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}