Evidence of a Spin-Glass Phase Transition ofa Site-Random Ising Model in Two Dimensions
Takayuki Shirakura, Fumitaka Matsubara
We study a site-random Ising (SRI) model in two dimensions (2D) using a Monte Carlo method. It is found that the Binder parameter g L 's for different sizes of the lattice L come together at almost the same temperature as in the ± J model in 3D. Finite-size scaling analyses give results which are compatible with the assumption of a finite, nonzero transition temperature ( T c ≠0), although the scaling temperature range is not large. We suggest that in the SRI model a spin glass (SG) phase transition occurs at T c ≠0 even in 2D.
Journal of the Physical Society of Japan•Jul 15, 1995•11 citations