Sun, Xin; Wu, F.Y. - In: Physica A: Statistical Mechanics and its Applications 106 (1981) 1, pp. 292-300
On the basis of the linked-graph expansion theorem established by one of us, it is shown that the modified F model in a small electric field is related to a two-dimensional nearest-neighbor Ising model in an external magnetic field. Applying this relation to the critical isotherm we get δ = 7,...