Orbital-selective Mott transitions in the degenerate Hubbard model
We investigate the Mott transitions in two-band Hubbard models with different bandwidths.
Applying dynamical mean field theory, we discuss the stability of itinerant quasiparticle
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.
Applying dynamical mean field theory, we discuss the stability of itinerant quasiparticle
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.
We investigate the Mott transitions in two-band Hubbard models with different bandwidths. Applying dynamical mean field theory, we discuss the stability of itinerant quasiparticle 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, .
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