{
  "id": "cond-mat/0212579",
  "version": "v1",
  "published": "2002-12-24T06:33:05.000Z",
  "updated": "2002-12-24T06:33:05.000Z",
  "title": "The specific heat of the rwo-dimensional +/-J Ising model",
  "authors": [
    "H. Kitatani",
    "T. Chino",
    "H. Ohya"
  ],
  "comment": "12 pages, 6 figures, submitted to J. Phys. A",
  "categories": [
    "cond-mat.dis-nn",
    "cond-mat.stat-mech"
  ],
  "abstract": "The specific heat of the two-dimensional $\\pm J$ Ising model has been investigated by the numerical transfer matrix method and Monte Carlo simulations from a new point of view. The region where a part of the specific heat takes the negative value has been investigated, which is characteristic of frustrated systems and reflects the non-trivial degeneracy of the ground state. The region mentioned above is found to be fairly large in the $p-T$ plane ($p$ is the concentration of the ferromagnetic bond and $T$ is the temperature). Moreover, it includes the Nishimori line. Namely, it includes a part of the paramagnetic-ferromagnetic phase boundary, on which the specific heat cannot diverge. The present result indicates that the specific heat does not diverge at least on a part of the paramagnetic-ferromagnetic phase boundary above the multicritical point, which is in conflict with previous results.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-12-24T06:33:05.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "specific heat",
      "ising model",
      "paramagnetic-ferromagnetic phase boundary",
      "rwo-dimensional",
      "numerical transfer matrix method"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2002cond.mat.12579K"
    }
  }
}