Surface versus bulk Mott transition in CaxLa1-xVO3
Abstract
The Mott insulator LaVO3 is known to become metallic if La is replaced by small concentrations of Ca. Since surface quasi-particle spectra of various perovskites are more strongly correlated than their bulk spectra, the coexistence of a metallic bulk and an insulating surface layer might be feasible. To investigate this possibility the dynamical mean field theory is used to evaluate the quasi-particle spectra in the bulk and at the surface of CaxLa1-xVO3 for various Ca concentrations.
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