Large-N phase transition in lattice 2-d principal chiral models
  We investigate the large-N critical behavior of 2-d lattice chiral models by Monte Carlo simulations of U(N) and SU(N) groups at large N. Numerical results confirm strong coupling analyses, i.e. the existence of a large-N second order phase transition at a finite $\beta_c$. 
M. Campostrini, P. Rossi and E. Vicari