Quasi-Particle Properties in Two-Orbital Correlated Electron Systems

Two-orbital correlated electron systems with the Hund coupling are investigated in a metallic phase close to the Mott insulator. We compute the single-particle spectrum by means of dynamical mean field theory combined with non-crossing approximation. We focus on two specific models, and discuss how the interplay of the Hurd coupling and the orbital splitting would result in a heavy quasi-particle hand near half filling.