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    National Tsing Hua University Institutional Repository > 歷任校長 > 陳信雄 (1997-1998) > 期刊論文 >  Quantum Monte Carlo study of the spin-1/2 Heisenberg model

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80744

    Title: Quantum Monte Carlo study of the spin-1/2 Heisenberg model
    Authors: Y.C. Chen;H.H. Chen;F. Lee
    教師: 陳信雄
    Date: 1991
    Publisher: American Physical Society
    Relation: PHYSICAL REVIEW B, American Physical Society, Volume 43, Issue 13, Part Part b, MAY 1 1991, Pages 11082-11087
    Abstract: Thermodynamic properties of the spin-1/2 Heisenberg ferromagnet are calculated by using Handscomb's Monte Carlo method. Several methods of analyses are used to determine critical properties of the model. For a square lattice we find that the susceptibility diverges exponentially at zero temperature. That is, chi approximately exp[b(J/k(B)T)] with the constant b = 4.5 +/- 0.5, which is lower than the prediction (b = 2-pi) of a modified spin-wave theory. For the simple-cubic lattice, we find that the critical temperature k(B)T(c)/J = 1.68 +/- 0.01, and the ratio of the exponents gamma/nu = 2.0 +/- 0.05, which are in good agreement with the estimates of the high-temperature series-expansion method.
    Relation Link: http://www.aps.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80744
    Appears in Collections:[陳信雄 (1997-1998)] 期刊論文
    [物理系] 期刊論文

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