title: Inclusion of intersite spatial correlations in the alloy analogy approach to the half-filled ionic Hubbard model.
abstract: Using the nonlocal coherent-potential approximation we study the effect of intersite spatial correlations on the transition from band insulator to metal as well as from metal to Mott insulator in the 'alloy analogy' approach to the paramagnetic solution of the half-filled ionic Hubbard model. We find that intersite spatial correlations enhance the metallic phase.
authors.affiliation: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China.
authors.forename: D A
authors.initials: DA
authors.lastname: Rowlands
authors.forename: Yu-Zhong
authors.initials: YZ
authors.lastname: Zhang
mesh_terms: D003198:Computer Simulation; D004553:Electric Conductivity; D004583:Electrons; D004735:Energy Transfer; D007477:Ions / Q000737:chemistry*; D060526:Magnetic Fields; D008670:Metals / Q000737:chemistry*; D008956:Models, Chemical
chemical_list: D007477:Ions; D008670:Metals