  We study spin glass behavior in a random Ising Coulomb antiferromagnet in two
and three dimensions using Monte Carlo simulations. In two dimensions, we find
a transition at zero temperature with critical exponents consistent with those
of the Edwards Anderson model, though with large uncertainties. In three
dimensions, evidence for a finite-temperature transition, as occurs in the
Edwards-Anderson model, is rather weak. This may indicate that the sizes are
too small to probe the asymptotic critical behavior, or possibly that the
universality class is different from that of the Edwards-Anderson model and has
a lower critical dimension equal to three.
