Heat-capacity (2-400 K) and inelastic-neutron-scattering studies of the phonon spectra are reported for superconducting, high-critical-field, Chevrel-phase, lead and tin molybdenum sulfides (Tc~11-15 K). Nine phonon modes per unit cell are identified whose frequencies are in the immediate region Bergmann and Rainer indicate is necessary to optimize Tc. Acoustic-phonon softening on cooling is observed. A molecular-crystal model is proposed for the lattice dynamics of these materials.
No takes yet. Share an insight, caveat, or question.
Bader et al. (1976) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: