Low frequency spectroscopy of the correlated metallic system   $Ca_xSr_{1-x}VO_3$
  We study the photoemission and optical conductivity response of the strongly correlated metallic system $Ca_xSr_{1-x}VO_3$. We find that the basic features of the transfer of spectral weight in photoemission experiments and the unusual lineshape of the optical response can be understood by modeling the system with a one band Hubbard model close to the Mott-Hubbard transition. We present a detailed comparison between the low frequency experimental data and the corresponding theoretical predictions obtained within the LISA method that is exact in the limit of large lattice connectivity. 
M. J. Rozenberg, I. H. Inoue, H. Makino, F. Iga and Y. Nishihara