Metal-insulator transition and magnetism in the two-orbital Hubbard model

Abstract

The description of transition metal oxides like LaMnO3 requires the use of models which take into account the orbital structure. The simplest such model is the two-orbital Hubbard model, which we study within dynamical mean-field theory, using Wilson's numerical renormalization group (NRG) to solve the quantum impurity problem arising in this approach. We present results for the Mott-Hubbard transition and antiferromagnetic phase close to half filling. (c) 2006 Elsevier B.V. All rights reserved.