Bosonization for 2D Interacting Fermion Systems: Non-Fermi Liquid   Behavior
  Non-Fermi liquid behavior is found for the first time in a two-dimensional (2D) system with non-singular interactions using Haldane's bosonization scheme. The bosonized system is solved exactly by a generalized Bogoliubov transformation. The fermion momentum distribution, calculated using a generalized Mattis-Lieb technique, exhibits a non-universal power law in the vicinity of the Fermi surface for intermediate interaction strengths. 
Y. Yu, Y. M. Li and N. d'Ambrumenil