Depolarized light-scattering study of molten zinc chloride

Abstract

Depolarized light-scattering experiments on molten ${\mathrm{ZnCl}}_{2}$ have been performed in the frequency range 1--4000 GHz between 300 and 650 \ifmmode^\circ\else\textdegree\fi{}C. The \ensuremath{\alpha} relaxation was observed up to 650 \ifmmode^\circ\else\textdegree\fi{}C. Comparison with mode coupling theory was attempted but gave inconclusive results due to the strong boson peak. The crossover temperature ${\mathit{T}}_{\mathit{c}}$ was found to be in the range 270--310 \ifmmode^\circ\else\textdegree\fi{}C. The thermal evolution of the boson peak in the liquid phase was followed up to 650 \ifmmode^\circ\else\textdegree\fi{}C.