Abstract
Theoretical interpretation of the thermally stimulated conductivity (TSC) is suggested for the temperatures at which transport is via hopping of carriers through localized bandtail states. The description is not based on specific assumptions used in the most of the previous TSC theories, such as, e.g., neglect of the retrapping of mobile carriers, etc. Our approach is based on the general concept of the transport energy according to which the transport path of hopping electrons in the bandtail is temperature dependent. This theory allows for a natural extension to higher temperatures and accounts for all existing experimentally observed trends in the TSC including the puzzling so far pinning of the low-temperature maximum on the TSC curves at different initial temperatures. Experimental results for the low-temperature TSC are presented, which are consistent with the theoretical predictions.
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