Evolution of Spectral Function in a Doped Mott Insulator: Surface vs Bulk Contributions
Evolution of Spectral Function in a Doped Mott Insulator: Surface vs Bulk Contributions
We study the evolution of the spectral function with progressive hole doping in a Mott insulator, ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{VO}}_{3}$ with $x\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.0--0.5$. The spectral features indicate a bulk-to-surface metal-insulator transition in this system. Doping dependent changes in the bulk electronic structure are shown to be incompatible with existing theoretical predictions. An empirical description …