LOW-TEMPERATURE PHASE OF ASYMMETRIC SPIN-GLASS MODEL IN 2 DIMENSIONS

We investigate low temperature properties of a random Ising model with +J and -aJ (a not equal 1) bonds in two dimensions using a cluster he at bath method. It is found that the Binder parameters g(L) for differ ent sizes of the lattice come together at almost the same temperature, implying the occurrence of the spin glass (SG) phase transition. From results of finite size scaling analyses, we suggest that the SG phase really occurs at low temperatures, which is characterized by a power law decay of spin correlations.