PMID: 15245300Jul 13, 2004Paper

Orbital-selective mott transitions in the degenerate Hubbard model

Physical Review Letters
Akihisa KogaManfred Sigrist

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 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, Ca2-xSrxRuO4.

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Citations

Dec 23, 2014·Nature Communications·Takahiro Misawa, Masatoshi Imada
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