Carrier flow through localized states in amorphous materials

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Abstract
Electrical conduction in amorphous solids containing both localized and extended states is examined. It is shown that even where there is a continuous distribution of localized states there need not be a continuous change in the energy at which the dominant part of the current flows, as a function of temperature. This gives rise to the concept of energy regions of limited current flow under equilibrium conditions. Conversely, it is shown that a continuous change in the energy of dominant flow, that is in the activation energy, can be used to characterize the energy distribution of the local product of the state density and mobility.

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