Pre-exponential factor ina-Se75In25-x Pb x thin films
Source abstract
Abstract
Temperature dependence of d.c. conductivity is studied ina- Se75In25-xPbx thin films wherex is varied from 0–10. From these measurements, the values of the pre-exponential factor (σ0) and activation energy (ΔE) are calculated for each glassy alloy. An approximate linear dependence of ln σ0 on AE is observed in this glassy system with good agreement between the expected and calculated σ0 values using Meyer-Neldel rule. Linear dependence of ln σ0 on ΔE in case of amorphous materials indicates that the conduction band tails a finite energy distance towards the valence band and Fermi level is controlled by fixed dominant hole levels deeper in the gap.
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Research context
OpenAlex topics: Phase-change materials and chalcogenides · Glass properties and applications · Material Dynamics and Properties
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References (25)
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