Phase diagram and exotic spin-spin correlations of anisotropic Ising model on the Sierpiński gasket
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  • 作者:Meng Wang ; Shi-Ju Ran ; Tao Liu ; Yang Zhao…
  • 关键词:Statistical and Nonlinear Physics
  • 刊名:The European Physical Journal B - Condensed Matter
  • 出版年:2016
  • 出版时间:February 2016
  • 年:2016
  • 卷:89
  • 期:2
  • 全文大小:808 KB
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  • 作者单位:Meng Wang (1)
    Shi-Ju Ran (1)
    Tao Liu (1)
    Yang Zhao (2)
    Qing-Rong Zheng (1)
    Gang Su (1)

    1. Theoretical Condensed Matter Physics and Computational Materials Physics Laboratory, School of Physics, University of Chinese Academy of Sciences, P.O. Box 4588, Beijing, 100049, P.R. China
    2. Department of Physics and Astronomy, University of Manitoba, Winnipeg, R3T 2N2, Canada
  • 刊物类别:Physics and Astronomy
  • 刊物主题:Physics
    Condensed Matter
    Physics
    Complexity
    Fluids
    Solid State Physics and Spectroscopy
    Superconductivity, Superfluidity and Quantum Fluids
  • 出版者:Springer Berlin / Heidelberg
  • ISSN:1434-6036
文摘
The anisotropic antiferromagnetic Ising model on the fractal Sierpiński gasket is intensively studied, and a number of exotic properties are disclosed. The ground state phase diagram in the plane of magnetic field-interaction of the system is obtained. The thermodynamic properties of the three plateau phases are probed by exploring the temperature-dependence of magnetization, specific heat, susceptibility and spin-spin correlations. No phase transitions are observed in this model. In the absence of a magnetic field, the unusual temperature dependence of the spin correlation length is obtained with 0 ≤ J b /J a < 1, and an interesting crossover behavior between different phases at J b /J a = 1 is unveiled, whose dynamics can be described by the J b /J a -dependence of the specific heat, susceptibility and spin correlation functions. The exotic spin-spin correlation patterns that share the same special rotational symmetry as that of the Sierpiński gasket are obtained in both the 1 / 3 plateau disordered phase and the 5/9 plateau partially ordered ferrimagnetic phase. Moreover, a quantum scheme is formulated to study the thermodynamics of the fractal Sierpiński gasket with Heisenberg interactions. We find that the unusual temperature dependence of the correlation length remains intact in a small quantum fluctuation. Keywords Statistical and Nonlinear Physics

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