Critical Point Correlation Function for the 2D Random Coupling Ising Model
Andrei Talapov, Vladimir Dotsenko
Abstract
High accuracy Monte Carlo simulation results for 1024*1024 Ising system with ferromagnetic impurity bonds are presented. Spin-spin correlation function at a critical point is found to be numerically very close to that of a pure system. This is not trivial since a critical temperature for the system with impurities is almost two times lower than pure Ising Tc. Small deviations from the pure behaviour contradict to some of the competing theories.
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