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《海军工程学院学报》 1990-01
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The Calculation of Critical Exponents of the Two-dimensional Square Lattice Ferromagnetic System Using the Method of PSRG

Jiang Xiaoqin Zheng Ruiling  
Using the method of Position Space Renormalization Group(PSRG), this paper has found the critical exponents for five spin blocks on a square lattice for the two-dimensional nearest-neithbour Ising model ferromagnetic system, with the terms in the block Hamiltonian retained to order V. We compare the results of this paper with the results exactly calculated for the ising model, and with the experimental results, and the results calculated for the three spin blocks on a triangular lattice. It is evident that all the values of the critical exponents obtained from this paper are more exact than the values obtained from the three spin block on a triangular lattice.
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