I was trying to use ICET to generate a cluster space for an adsorption system with atomic oxygen on copper fcc 111, and I was trying to only expand the primitive structure in x and y directions by setting the periodic boundary condition
pbc=[True, True, False]. However, it looks like ICET has a check to prevent this. I was wondering is it still possible to construct the cluster expansion in 2D?
Any suggestion would be appreciated!