Abstract
Recent models for the electronic structure of multicomponent chalcogenide glasses have led to the conclusion that the Fermi level is essentially pinned near the center of the gap by a relatively low-energy defect center. Expressions for the conductivity, thermoelectric power, and Hall coefficient of these glasses are calculated within such a model. When the effective mass of holes in the valence band is larger than that of electrons in the conduction band, it is found that a $p$-type thermopower and an $n$-type Hall coefficient can coexist over a wide temperature range, an anomaly which has been reported for a variety of glasses. In addition, the model explains several salient features of the transport coefficients measured in some of these glasses.
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