{
  "id": "0709.3589",
  "version": "v2",
  "published": "2007-09-22T16:58:56.000Z",
  "updated": "2008-04-09T20:44:59.000Z",
  "title": "Quantum-Mechanically Induced Asymmetry in the Phase Diagrams of Spin-Glass Systems",
  "authors": [
    "C. Nadir Kaplan",
    "A. Nihat Berker"
  ],
  "comment": "Added discussion of second-order transitions between ordered phases, driven by quenched disorder. 4 pages, 1 figure, 3 tables. Published version",
  "journal": "Phys. Rev. Lett. 100, 027204 (2008)",
  "doi": "10.1103/PhysRevLett.100.027204",
  "categories": [
    "cond-mat.dis-nn",
    "cond-mat.stat-mech"
  ],
  "abstract": "The spin-1/2 quantum Heisenberg model is studied in all spatial dimensions d by renormalization-group theory. Strongly asymmetric phase diagrams in temperature and antiferromagnetic bond probability p are obtained in dimensions d \\geq 3. The asymmetry at high temperatures approaching the pure ferromagnetic and antiferromagnetic systems disappears as d is increased. However, the asymmetry at low but finite temperatures remains in all dimensions, with the antiferromagnetic phase receding to the ferromagnetic phase. A finite-temperature second-order phase boundary directly between the ferromagnetic and antiferromagnetic phases occurs in d \\geq 6, resulting in a new multicritical point at its meeting with the boundaries to the paramagnetic phase. In d=3,4,5, a paramagnetic phase reaching zero temperature intervenes asymmetrically between the ferromagnetic and reentrant antiferromagnetic phases. There is no spin-glass phase in any dimension.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2008-04-09T20:44:59.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "75.10.Nr",
      "05.10.Cc",
      "05.45.Df",
      "64.60.ae"
    ],
    "keywords": [
      "phase diagrams",
      "quantum-mechanically induced asymmetry",
      "spin-glass systems",
      "phase reaching zero temperature",
      "reaching zero temperature intervenes"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2008,
      "month": "Jan",
      "volume": 100,
      "number": 2,
      "pages": "027204"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvL.100b7204K"
    }
  }
}