Disordered Ising model with correlated frustration

Abstract

We consider the $\pm J$ Ising model on a cubic lattice with a gauge-invariant disorder distribution. Disorder depends on a parameter $\beta_G$ that plays the role of a chemical potential for the amount of frustration. We study the model at a specific value of the disorder parameter $\beta_G$, where frustration shows long-range correlations. We characterize the universality class, obtaining accurate estimates of the critical exponents: $\nu = 0.655(15)$ and $\eta_q = 1.05(5)$, where $\eta_q$ is the overlap susceptibility exponent.