Quantitative study of the Kosterlitz-Thouless phase transition in an XY model of two-dimensional plane rotators: High-temperature expansions to order beta 20.
作者： P. Butera , M. Comi
DOI: 10.1103/PHYSREVB.47.11969
关键词:
摘要: High-temperature series expansions of the spin-spin correlation function for plane rotator (or XY) model on square lattice are extended by three terms through order β 20 . Tables expansion coefficients reported spherical moments l=0, 1, 2. The 15 vorticity also tabulated. Our analysis supports Kosterlitz-Thouless predictions structure critical singularities and leads to fairly accurate estimates parameters
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