  Bulk-sensitive high-resolution photoemission was carried out on a prototype
3d1 metallic Sr1-xCaxVO3. In a strong contrast to so far reported results, the
bulk spectral functions are revealed to be insensitive to x. The conservation
of the density of states at the Fermi level in spite of the electron
correlation is clarified by the successful suppression and deconvolution of the
surface contribution. Our study has demonstrated the importance of high-energy
and high-resolution photoemission spectroscopy for revealing detailed bulk
electronic states of transition metal oxides.
