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Five-loop ε-expansions for random Ising model and marginal spin dimensionality for cubic systems

B. N. Shalaev, S. A. Antonenko, A. I. Sokolov

cond-mat.stat-mecharXiv:cond-mat/9803388

Abstract

The ε-expansions for critical exponents of the weakly-disordered Ising model are calculated up to the five-loop order and found to possess coefficients with irregular signs and values. The estimate nc = 2.855 for the marginal spin dimensionality of the cubic model is obtained by the Pade-Borel resummation of corresponding five-loop ε-expansion.

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