Interface localization-delocalization in a double wedge:: A new universality class with strong fluctuations and anisotropic scaling -: art. no. 136101

Using Monte Carlo simulations and finite-size scaling methods we study wetting in Ising systems in a L x L x L-y pore with quadratic cross section. Antisymmetric surface fields H-s act on the free L x L-y surfaces of the opposing wedges, and periodic boundary conditions are applied along the y direction. In the limit L --> infinity, L-y/L-3 = const, the system exhibits a new type of phase transition, which is the analog of the filling transition that occurs in a single wedge. It is characterized by critical exponents alpha = 3/4, beta = 0, and gamma = 5/4 for the specific heat, order parameter, and susceptibility, respectively.