PHONON ANOMALIES IN INTERMEDIATE VALENT SMXL1-XS

Phonon anomalies in intermediate valence compounds SmxLa1-xS (x = 0.90 , 0.75, 0.65) have been investigated by using breathing shell model (B SM). The BSM includes breathing motion of electron shells of the rare earth atom due to f-d hybridization. The phonon dispersion curves of i ntermediate valence compounds (IVC) SmxLa1-xS, calculated from present model follow the same trend as observed in other IVCs. We have also c alculated the one phonon density of states. We could not compare our r esults with experimental measurements as they are not available so far . (C) 1998 Elsevier Science Ltd.