Mott transitions in multiorbital systems.
Using the dynamical mean field theory it is shown that interorbital Coulomb interactions in nonisotropic multiorbital materials give rise to a single Mott transition. Nevertheless, narrow and wide subbands exhibit different excitation spectra in the metallic and insulating phases. The close analogy between "multigap" insulating behavior and multigap superconductivity is pointed out.
Liebsch
A
A
Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany. a.liebsch@fz-juelich.de