Orbital-selective Mott transitions in the degenerate Hubbard model

Abstract

We investigate the Mott transitions in two-band Hubbard models with different bandwidths. Applying dynamical mean field theory, we discuss the stability of itinerant quasi-particle states in each band. We demonstrate that separate Mott transitions occur at different Coulomb interaction strengths in general, which merge to a single transition only under special conditions. This kind of behavior may be relevant for the physics of the single-layer ruthenates, Ca${}_{2-x}$Sr${}_x$RuO${}_4$.

4 pages, 4 figures

References in corpus (1)

• Orbital Dependent Phase Control in Ca2-xSrxRuO4

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