1 Ocak 2010 Dergi makalesi Açık Erişim

Malakis, A.; Berker, A. Nihat; Hadjiagapiou, I. A.; Fytas, N. G.; Papakonstantinou, T.

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        "affiliation": "Univ Athens, Sect Solid State Phys, Dept Phys, GR-15784 Athens, Greece", 
        "name": "Malakis, A."
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      {
        "name": "Berker, A. Nihat"
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      {
        "affiliation": "Univ Athens, Sect Solid State Phys, Dept Phys, GR-15784 Athens, Greece", 
        "name": "Hadjiagapiou, I. A."
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      {
        "affiliation": "Univ Athens, Sect Solid State Phys, Dept Phys, GR-15784 Athens, Greece", 
        "name": "Fytas, N. G."
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      {
        "affiliation": "Univ Athens, Sect Solid State Phys, Dept Phys, GR-15784 Athens, Greece", 
        "name": "Papakonstantinou, T."
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    "description": "The effects of bond randomness on the ground-state structure, phase diagram and critical behavior of the square lattice ferromagnetic Blume-Capel (BC) model are discussed. The calculation of ground states at strong disorder and large values of the crystal field is carried out by mapping the system onto a network and we search for a minimum cut by a maximum flow method. At finite temperatures the system is studied by an efficient two-stage Wang-Landau (WL) method for several values of the crystal field, including both the first- and second-order phase transition regimes of the pure model. We attempt to explain the enhancement of ferromagnetic order and we discuss the critical behavior of the random-bond model. Our results provide evidence for a strong violation of universality along the second-order phase transition line of the random-bond version. (C) 2010 Elsevier B.V. All rights reserved.", 
    "doi": "10.1016/j.physa.2009.12.064", 
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      "issue": "15", 
      "pages": "2930-2933", 
      "title": "PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS", 
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