{
  "id": "0808.2124",
  "version": "v1",
  "published": "2008-08-15T10:31:33.000Z",
  "updated": "2008-08-15T10:31:33.000Z",
  "title": "Monte Carlo studies of extensions of the Blume-Emery-Griffiths model",
  "authors": [
    "C. C. Loois",
    "G. T. Barkema",
    "C. Morais Smith"
  ],
  "comment": "9 pages, 12 figures",
  "doi": "10.1103/PhysRevB.78.184519",
  "categories": [
    "cond-mat.stat-mech",
    "cond-mat.supr-con"
  ],
  "abstract": "We extend the Blume-Emery-Griffiths (BEG) model to a two-component BEG model in order to study 2D systems with two order parameters, such as magnetic superconductors or two-component Bose-Einstein condensates. The model is investigated using Monte Carlo simulations, and the temperature-concentration phase diagram is determined in the presence and absence of an external magnetic field. This model exhibits a rich phase diagram, including a second-order transition to a phase where superconductivity and magnetism coexist. Results are compared with experiments on Cerium-based heavy-fermion superconductors. To study cold atom mixtures, we also simulate the BEG and two-component BEG models with a trapping potential. In the BEG model with a trap, there is no longer a first order transition to a true phase-separated regime, but a crossover to a kind of phase-separated region. The relation with imbalanced fermi-mixtures is discussed. We present the phase diagram of the two-component BEG model with a trap, which can describe boson-boson mixtures of cold atoms. Although there are no experimental results yet for the latter, we hope that our predictions could help to stimulate future experiments in this direction.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2008-08-15T10:31:33.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "67.85.Fg",
      "05.10.Ln"
    ],
    "keywords": [
      "monte carlo studies",
      "two-component beg model",
      "blume-emery-griffiths model",
      "extensions",
      "study cold atom mixtures"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2008,
      "month": "Nov",
      "volume": 78,
      "number": 18,
      "pages": 184519
    },
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvB..78r4519L"
    }
  }
}