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Simulation Evidence for Nonlocal Interface Models: Two Correlation Lengths Describe Complete Wetting

2011; American Physical Society; Volume: 106; Issue: 23 Linguagem: Inglês

10.1103/physrevlett.106.236102

1092-0145

Lijun Pang, D. P. Landau, Kurt Binder,

Advanced Thermodynamics and Statistical Mechanics

Monte Carlo simulations of (fluctuating) interfaces in Ising models confined between competing walls at temperatures above the wetting transition are presented and various correlation functions probing the interfacial fluctuation are computed. Evidence for the nonlocal interface Hamiltonian approach of A. O. Parry et al. [Phys. Rev. Lett. 93, 086104 (2004)] is given. In particular, we show that two correlation lengths exist with different dependence on the distance D between the walls.