Thermally Activated Photoconduction and Alternating-Current Conduction in Se₇₅Ge₂₀Ag₅ Chalcogenide Glass: Investigation of Meyer--Neldel Rule

We report on the observation of Meyer--Neldel rule in glassy Se₇₅Ge₂₀Ag₅ alloy where ∆E is varied by two different methods. In the first approach, the intensity of light varies while measuring the photoconductivity in amorphous thin films of Se₇₅Ge₂₀Ag₅ instead of changing composition of the glassy system. In the second approach, the variation of ac conductivity with temperature is found to be exponential and the activation energy is found to vary with frequency.