Phase Diagram and Critical Exponents of the ±J Ising Model in Finite Dimensions by Monte Carlo Renormalization Group
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概要
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We have performed large-scale numerical simulations for the "rJ Ising model onthe simple cubic and the square lattices with asymmetric weight of ferromagnetic andantiferromagnetic bonds. The Monte Carlo renormalization group method is used toestimate T., y/ v, 73/ v and v at various points along the phase boundary between ferromagnetic and paramagnetic phases including the tricritical point. The obtainedvalues of T. and the resulting phase diagrams of the simple cubic and the square Rat-tices are much more accurate than those estimated so far. In the simple cubic lattice,we find evidence for the possibility that universality of the ferromagnetic critical ex-ponents holds along the critical line except at the tricritical point, while weak universality holds even at the tricritical point. Weak universality seems to hold also in thesquare lattice.
- 社団法人日本物理学会の論文
- 1987-04-15
著者
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Ozeki Yukiyasu
Department Of Physics Tokyo Institute Of Technology
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Nishimori Hidetoshi
Department Of Physics Facuilty Of Science Tokyo Institute Of Technology
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Ozeki Yukiyasu
Department Of Applied Physics And Chemistry The University Of Electro-communications
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