Wetting and interfacial adsorption in the Blume-Capel model on the square lattice

• Published in: The European physical journal. B, Condensed matter physics Vol. 86; no. 9
• Main Authors: Fytas, N. G., Selke, W.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-09-2013; EDP Sciences; Springer
• Subjects: Adsorption; Analysis; Chemical properties; Complex Systems; Condensed Matter Physics; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Fluid- and Aerodynamics; Physics; Physics and Astronomy; Regular Article; Solid State Physics; Solid-fluid interfaces; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Wetting; Statistical and Nonlinear Physics; Interfaces; Specific heat; Phase diagrams; Monte Carlo methods; Adsorption; Magnetization; Wetting; Ising model; Square lattices; Magnetic susceptibility
• ISSN: 1434-6028; 1434-6036
• DOI: 10.1140/epjb/e2013-40475-6

We study the Blume-Capel model on the square lattice. To allow for wetting and interfacial adsorption, the spins on opposite boundaries are fixed in two different states, “+1” and “−1”, with reduced couplings at one of the boundaries. Using mainly Monte Carlo techniques, of Metropolis and Wang-Landau type, phase diagrams showing bulk and wetting transitions are determined. The role of the non-boundary state, “0”, adsorbed preferably at the interface between “−1” and “+1” rich regions, is elucidated.