Understanding the bulk electronic structure of Ca_1−xSr_xVO₃

Abstract

We investigate the electronic structure of Ca_1−xSr_xVO₃ using careful state-of-the-art experiments and calculations. Photoemission spectra using synchrotron radiation reveal a hitherto unnoticed polarization dependence of the photoemission matrix elements for the surface component leading to a substantial suppression of its intensity. Bulk spectra extracted with the help of experimentally determined electron escape depth and estimated suppression of surface contributions resolve outstanding puzzles concerning the electronic structure in Ca_1−xSr_xVO₃.