OPTICAL-SPECTRA OF THE CORRELATED METALLIC SYSTEM CA1-XSRXVO3

Optical reflectivity spectra are studied for single crystals of a pero vskite-related 3d(1) correlated metallic system Ca1-xSrxVO3. The measu rement is made at room temperature between 0.03 and 40 eV. In the opti cal conductivity spectra a Drude-like contribution peaked at omega = 0 and other two contributions, which may be associated with Hubbard ban d and a quasiparticle band at E-F, are observed below 5 eV. The infini te-dimension Hubbard model seems to reproduce the observed features in CaVO3. However, the evolution of these features on varying the value of x is not exactly what we expect from the model.