On the critical cluster in the two-dimensional Ising model: computer-assisted exact results.
For a nearest-neighbor Ising model on a square lattice all cluster configurations with 17 or fewer spins are identified. In neglect of cluster-cluster interactions, critical sizes and barriers to nucleation are obtained as functions of temperature and magnetic field for two alternative definitions of a "critical cluster."
Shneidman
Vitaly A
VA
Department of Physics, New Jersey Institute of Technology, Newark, NJ 07102, USA.
Nita
Gelu M
GM