Measurements of the electrical conductivity sigma , thermoelectric power S and magnetic susceptibility of liquid Ag1-xSex alloys have been measured as a function of composition and temperature. The unusual maximum in sigma , along with the negative d sigma /dT observed around stoichiometry for Ag-S alloys is also observed in this system. The thermopower shows a p-n transition at x=0.36 with a magnitude indicating that this is a liquid semiconductor with an essentially zero energy gap. It is demonstrated that the results cannot be explained using the Kubo-Greenwood expressions for sigma and S if rigid band behaviour is assumed. The origins of this unusual behaviour are discussed in terms of an enhanced carrier mobility near the stoichiometric composition.
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Ohno et al. (1994) studied this question.
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