{
  "id": "cond-mat/0305434",
  "version": "v2",
  "published": "2003-05-19T11:56:48.000Z",
  "updated": "2003-07-30T06:11:46.000Z",
  "title": "Critical equation of state of randomly dilute Ising systems",
  "authors": [
    "P. Calabrese",
    "M. De Prato",
    "A. Pelissetto",
    "E. Vicari"
  ],
  "comment": "21 pages, 1 figure, refs added",
  "journal": "Phys.Rev. B68 (2003) 134418",
  "doi": "10.1103/PhysRevB.68.134418",
  "categories": [
    "cond-mat.stat-mech",
    "cond-mat.dis-nn",
    "hep-lat"
  ],
  "abstract": "We determine the critical equation of state of three-dimensional randomly dilute Ising systems, i.e. of the random-exchange Ising universality class. We first consider the small-magnetization expansion of the Helmholtz free energy in the high-temperature phase. Then, we apply a systematic approximation scheme of the equation of state in the whole critical regime, that is based on polynomial parametric representations matching the small-magnetization of the Helmholtz free energy and satisfying a global stationarity condition. These results allow us to estimate several universal amplitude ratios, such as the ratio A^+/A^- of the specific-heat amplitudes. Our best estimate A^+/A^-=1.6(3) is in good agreement with experimental results on dilute uniaxial antiferromagnets.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2003-07-30T06:11:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "critical equation",
      "helmholtz free energy",
      "random-exchange ising universality class",
      "three-dimensional randomly dilute ising systems",
      "universal amplitude ratios"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 619113
    }
  }
}