Abstract
The renormalization-group transformations for a square Ising spin lattice are evaluated in a four-cell-cluster approximation to obtain the critical surface in a three-dimensional space of spin-interaction parameters. Agreement is found with known critical curves, particularly Baxter's analytic solution.
- Received 31 July 1974
DOI:https://doi.org/10.1103/PhysRevLett.33.944
©1974 American Physical Society
