Interfacial adsorption in two-dimensional Potts models.

E. Carlon
Laboratoire de Physique des Materiaux, Universite Henri Poincare,
F-54506 Nancy, France

F. Igloi
Research Institute for Solid State Physics, H-1525 Budapest,
P.O.Box 49, Hungary
Institute for Theoretical Physics, Szeged University
H-6720 Szeged, Hungary

Selke, W., Szalma, F.
Institut für Theoretische Physik, Technische Hochschule Aachen,
D-52056 Aachen, Germany


The interfacial adsorption W at the first-order transition in two-dimensional q-state Potts models is studied. In particular, findings of Monte Carlo simulations and of density-matrix renormalization group calculations, at q= 16, are consistent with the analytic result, obtained in the Hamiltonian limit at large values of q, that W \propto t^{-1/3} on approach to the bulk critical temperature T_c, t= |T_c - T|/T_c. In addition, the numerical findings allow to estimate corrections to scaling. Our study supports and specifies a previous conclusion by Bricmont and Lebowitz based on low-temperature expansions.