Influence of electronic structure of CeSbNi0.15 on its optical conductivity

The reflectivity of CeSbNi0.15 is measured at several temperatures in the low energy regions. The optical conductivity is obtained from the measured reflectivity. The carrier concentration and the relaxation time are evaluated by the Drude model. It is found that the p–f mixing collapse takes place in CeSbNi0.15 and that the gap formation occurs at 7 K.