Critical behavior of the two-dimensional<i>N</i>-component Landau-Ginzburg Hamiltonian with cubic anisotropy
Critical behavior of the two-dimensional<i>N</i>-component Landau-Ginzburg Hamiltonian with cubic anisotropy
We study the two-dimensional N-component Landau-Ginzburg Hamiltonian with cubic anisotropy. We compute and analyze the fixed-dimension perturbative expansion of the renormalization-group functions to four loops. The relations of these models with N-color Ashkin-Teller models, discrete cubic models, the planar model with fourth-order anisotropy, and the structural phase transition in adsorbed …