{
  "id": "cond-mat/0303470",
  "version": "v2",
  "published": "2003-03-21T19:50:54.000Z",
  "updated": "2003-07-14T20:19:35.000Z",
  "title": "New universality class for the three-dimensional XY model with correlated impurities: Application to $^4$He in aerogels",
  "authors": [
    "Carlos Vásquez-Romero",
    "R. Paredes-Villegas",
    "A. Hasmy",
    "R. Jullien"
  ],
  "comment": "4 pages, 4 figures, submitted to Phys. Rev. Lett",
  "journal": "Phys. Rev. Lett. 90, 170602 (2003)",
  "doi": "10.1103/PhysRevLett.90.170602",
  "categories": [
    "cond-mat.stat-mech",
    "cond-mat.dis-nn",
    "physics.comp-ph"
  ],
  "abstract": "Encouraged by experiments on $^4$He in aerogels, we confine planar spins in the pores of simulated aerogels (diffusion limited cluster-cluster aggregation) in order to study the effect of quenched disorder on the critical behavior of the three-dimensional XY model. Monte Carlo simulations and finite-size scaling are used to determine critical couplings $K_c$ and exponents. In agreement with experiments, clear evidence of change in the thermal critical exponents $\\nu$ and $\\alpha$ is found at nonzero volume fractions of impurities. These changes are explained in terms of {\\it hidden} long-range correlations within disorder distributions.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2003-07-14T20:19:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "three-dimensional xy model",
      "universality class",
      "correlated impurities",
      "application",
      "confine planar spins"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}