Combined effects of disorders and electron-electron interactions upon   metal-insulator transition in 2D non-bipartite lattice
  We examined the characteristics of a metal-insulator transition on a two-dimensional non-bipartite lattice when both disorders and electron interactions are present. Using a real-space renormalization group method and finite-size scaling analysis we have found that after the disordered system transits from the insulating state to the metal one, it can reenter an insulating state if there is a further increase in the electron-electron interactions. 
Jiaxiang Wang, Sabre Kais