Ising cubes with enhanced surface couplings
Pleimling, M. and Selke, W.
Institut für Theoretische Physik, Technische Hochschule Aachen,
D-52056 Aachen, Germany
Using Monte Carlo techniques, Ising cubes with ferromagnetic
nearest--neighbor interactions and enhanced couplings
between surface spins are studied. In
particular, at the surface transition, the corner magnetization
shows non-universal, coupling-dependent
critical behavior in the thermodynamic limit. Results on
the critical exponent of the corner magnetization are compared to
previous findings on two-dimensional Ising models
with three intersecting defect lines.