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    NTHUR > Presidents > Chen, Hsin-Hsiung (1997-1998) > CHH Journal / Magazine Articles  >  High Temperature Susceptibility Series for the Spin-l/2 Anisotropic Heisenberg Model

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    Title: High Temperature Susceptibility Series for the Spin-l/2 Anisotropic Heisenberg Model
    Authors: D.C. Jou;H.H. Chen
    Teacher: 陳信雄
    Date: 1973
    Publisher: Institute of Physics
    Relation: JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, Institute of Physics, Volume 6, Issue 17, 1973, Pages 2713-2720
    Keywords: Spin-l/2
    Anisotropic Heisenberg Model
    Abstract: The exact high temperature susceptibility series for the spin-1/2 uniaxially anisotropic Heisenberg model is derived through order T-7 for various lattices and anisotropies. The series is extrapolated by the Pade approximant method to give the critical parameters for a ferromagnet having spontaneous magnetization parallel to the symmetry axis of the system. When the anisotropy changes from the Ising limit to the isotropic Heisenberg limit the critical temperature of the system decreases, slowly in the Ising limit and rapidly in the isotropic limit. Our results are consistent with the hypothesis that the critical index remains constant as the anisotropy varies from the Ising limit toward the isotropic limit, and changes discontinuously when the system becomes isotropic.
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    Appears in Collections:[Chen, Hsin-Hsiung (1997-1998)] CHH Journal / Magazine Articles
    [Department of Physics] PHYS Journal / Magazine Articles

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