Duality dc and frequency-dependent conductivity in ionic glasses: A possible experimental approach.

Abstract

Contrary to the usual interpretations, we experimentally show that the frequency-independent (dc conductivity) and frequency-dependent (polarization conductivity) conductivities of ionic glassy conductors can be considered to be independent of each other. Indeed, after having inserted two ionic glasses (${\mathrm{Na}}_{2}$O\ensuremath{\cdot}3SiO2,${\mathrm{Ag}}_{2}$S\ensuremath{\cdot}${\mathrm{GeS}}_{2}$) between inert dielectrics, we observe that though the dc conductivity disappears, the polarization-conductivity behavior, i.e., the frequency power law, remains unchanged.