Interface localization-delocalization in a double wedge: a new universality class with strong fluctuations and anisotropic scaling

• Published in: Physical review letters Vol. 90; no. 13; p. 136101
• Main Authors: Milchev, A, Müller, M, Binder, K, Landau, D P
• Format: Journal Article
• Language: English
• Published: United States 04.04.2003
• ISSN: 0031-9007
• DOI: 10.1103/PhysRevLett.90.136101

Using Monte Carlo simulations and finite-size scaling methods we study "wetting" in Ising systems in a LxLxL(y) pore with quadratic cross section. Antisymmetric surface fields H(s) act on the free LxL(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.