Light-scattering spectroscopy of the liquid-glass transition in ${\mathrm{CaKNO}}_3$ and in the molecular glass Salol: Extended-mode-coupling-theory analysis

Recently reported light-scattering studies of ${\mathrm{CaKNO}}_3$ and Salol are reanalyzed, using the extended version of the mode-coupling theory of the liquid-glass transition including activated transport or hopping effects. Problems found in the original fits due to the neglect of hopping terms are largely corrected, and quantitative predictions for the susceptibility minimum below the crossover temperature ${\mathit{T}}_{\mathit{c}}$ are found. The results are also shown to accurately explain the ${\mathrm{CaKNO}}_3$ neutron spin-echo data reported by Mezei [J. Non-Cryst. Solids 131–133, 317 (1991)].