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    National Tsing Hua University Institutional Repository > 歷任校長 > 陳信雄 (1997-1998) > 期刊論文 >  Modified Migdal-Kadanoff Renormalization for the Spin-l/2 Anisotropic Heisenberg Model


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80739


    Title: Modified Migdal-Kadanoff Renormalization for the Spin-l/2 Anisotropic Heisenberg Model
    Authors: F. Lee;H.H. Chen;H.C. Tseng
    教師: 陳信雄
    Date: 1988
    Publisher: American Physical Society
    Relation: PHYSICAL REVIEW B, American Physical Society, Volume 38, Issue 1, JUL 1 1988, Pages 508-511
    Keywords: Migdal-Kadanoff
    Renormalization
    Spin-l/2
    Anisotropic Heisenberg Model
    Abstract: The spin-(1/2 anisotropic Heisenberg model is studied by a modified Migdal-Kadanoff method, called the cluster-decimation approximation. The free energy for a small cluster of spins with an appropriate boundary condition is assumed to be preserved in the bond-moving step and the approximate decimation of Suzuki and Takano is adopted in the site-decimation step. Critical temperatures obtained by the present method are in general much better than those determined by preserving the high-temperature series expansion of the free energy. In particular the XY fixed point and the isotropic Heisenberg fixed point for the square lattice are not found in the present calculation.
    Relation Link: http://www.aps.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80739
    Appears in Collections:[物理系] 期刊論文
    [陳信雄 (1997-1998)] 期刊論文

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