Arctic curves of the six-vertex model on generic domains: the Tangent   Method
  We revisit the problem of determining the Arctic curve in the six-vertex model with domain wall boundary conditions. We describe an alternative method, by which we recover the previously conjectured analytic expression in the square domain. We adapt the method to work for a large class of domains, and for other models exhibiting limit shape phenomena. We study in detail some examples, and derive, in particular, the Arctic curve of the six-vertex model in a triangoloid domain at the ice-point. 
Filippo Colomo and Andrea Sportiello
math-ph cond-mat.stat-mech math.CO math.MP