Observation of a tricritical wedge filling transition in the 3D Ising   model
  In this Letter we present evidences of the occurrence of a tricritical filling transition for an Ising model in a linear wedge. We perform Monte Carlo simulations in a double wedge where antisymmetric fields act at the top and bottom wedges, decorated with specific field acting only along the wegde axes. A finite-size scaling analysis of these simulations shows a novel critical phenomenon, which is distinct from the critical filling. We adapt to tricritical filling the phenomenological theory which successfully was applied to the finite-size analysis of the critical filling in this geometry, observing good agreement between the simulations and the theoretical predictions for tricritical filling. 
A. Rodriguez-Rivas, J. M. Romero-Enrique, L. F. Rull and A. Milchev
cond-mat.soft cond-mat.stat-mech