Mobile cation motion in superionic glasses

Abstract

Here we present a neutron scattering study of superionic conductivity in glassy (AgI)0.5(AgPO3)0.5 and (AgI)0.33(Ag2S)0.33(AgPO3)0.34 using the TOF spectrometer NEAT at BENSC, Berlin. We observe the onset of quasielastic scattering in the sub-meV energy range in the doped samples below room temperature, that is absent in the undoped one. The analysis of the Q-dependence of the quasielastic scattering gives evidence that this scattering originates from localized back-and-forth oscillating jumps of the Ag ions leading to the superionic conductivity within the solid glass matrix

Keywords

Quasielastic neutron scattering
Ionic superconductivity
Glasses