Accurate Monte Carlo critical exponents for Ising lattices

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A careful Monte Carlo investigation of the phase transition very close to the critical point (T -> Tc, H -> 0) in relatively large d = 3, s = 1/2 Ising lattices did produce critical exponents beta = 0.3126(4) = 5/16, delta⁻¹ = 0.1997(4) = 1/5 and gamma₃D = 1.253(4) = 5/4. Our results indicate that, within experimental error, they are given by simple fractions corresponding to the linear interpolations between the respective two-dimensional (Onsager) and four-dimensional (mean field) critical exponents. An analysis of our inverse susceptibility data chi⁻¹(T) vs. /T - Tc/ shows that these data lead to a value of gamma₃D compatible with gamma' = gamma and Tc = 4.51152(12), while gamma values obtained recently by high and low temperature series expansions and renormalization group methods are not.