{
  "id": "cond-mat/0111532",
  "version": "v1",
  "published": "2001-11-28T14:24:18.000Z",
  "updated": "2001-11-28T14:24:18.000Z",
  "title": "Spin instabilities and quantum phase transitions in integral and fractional quantum Hall states",
  "authors": [
    "Arkadiusz Wojs",
    "John J. Quinn"
  ],
  "comment": "4 pages, 5 figures, submitted to Phys.Rev.Lett",
  "journal": "Phys. Rev. B 65, 201301 (2002)",
  "doi": "10.1103/PhysRevB.65.201301",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "The inter-Landau-level spin excitations of quantum Hall states at filling factors nu=2 and 4/3 are investigated by exact numerical diagonalization for the situation in which the cyclotron (hbar*omega_c) and Zeeman (E_Z) splittings are comparable. The relevant quasiparticles and their interactions are studied, including stable spin wave and skyrmion bound states. For nu=2, a spin instability at a finite value of epsilon=hbar*omega_c-E_Z leads to an abrupt paramagnetic to ferromagnetic transition, in agreement with the mean-field approximation. However, for nu=4/3 a new and unexpected quantum phase transition is found which involves a gradual change from paramagnetic to ferromagnetic occupancy of the partially filled Landau level as epsilon is decreased.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2001-11-28T14:24:18.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "fractional quantum hall states",
      "spin instability",
      "inter-landau-level spin excitations",
      "skyrmion bound states",
      "unexpected quantum phase transition"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}