Temperature dependence of Raman scattering in K3Ba3C60

Raman spectra at different temperatures are reported for K3Ba3C60. A system atic change of the Raman spectra with temperature is observed. The developm ent of the linewidth and intensity for all modes with temperature is in sha rp contrast to the case for pure C-60 An anomalously large up-shift of 9 cm (-1) between 20 K and room temperature for the pinch Ag(2) mode suggests th e existence of hybridization between the C60 molecules and the intercalants . The relative intensity of the doublet of Ag(1) systemtically changes with decreasing temperature.