Renormalization-group calculation for the equation of state of an Ising ferromagnet
Bernard Nienhuis, Michael Nauenberg
The renormalization-group series expansion for the free energy of the Ising model is applied to obtain the equation of state in an external magnetic field. Numerical calculations for a square lattice in a four-cell-cluster approximation are compared in the scaling limit with results of high- and low-temperature series expansions.
Physical review. B, Solid state•Jun 1, 1975•53 citations