It was demonstrated that the strong coupling surface structural phase transition, as observed on the (001) face of body-centered cubic group transition metals, could be studied by using an effective 2-dimensional lattice Hamiltonian. This Hamiltonian provided an accurate description of the zero-temperature properties, and was convenient for a detailed study of the finite-temperature phase diagram and critical fluctuation properties of the structural phase transition.

Two-Dimensional Lattice Hamiltonian for Surface Reconstruction. G.Y.Hu, S.C.Ying: Surface Science, 1985, 150[1], 47-54