Surface versus bulk Mott transition in Ca$_x$La$_{1-x}$VO$_3$

Details Surface versus bulk Mott transition in Ca$_x$La$_{1-x}$VO$_3$ Surface versus bulk Mott transition in Ca$_x$La$_{1-x}$VO$_3$

2003-01-28

arxiv.org/abs/cond-mat/0301537v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

The Mott insulator LaVO$_3$ 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 Ca$_x$La$_{1-x}$VO$_3$ for various Ca concentrations.

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