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- W1970590911 abstract "Abstract The Hall coefficient, electrical resistivity and thermoelectric power have been measured for a variety of Ag 2 Te samples near melting point and in the liquid state up to 1500°K. It was found that fusion is accompanied by a large drop of Hall coefficient, a small drop of electrical resistivity and an abrupt change of sign for thermoelectric power. In the liquid state, the magnitudes of the transport parameters remain relatively high as compared with metals. This particular behaviour has been discussed on the basis of a possible contribution of Ag + ions to the transport phenomena. In the present paper, a new interpretation is proposed which appears more adequate for experimental results. First, the abrupt reversal in sign for the thermoelectric power, which becomes positive in the liquid state indicates that a high concentration of acceptor defects is introduced by fusion. It is supposed morever that the breakdown of long-range order may cause a decrease of the energy gap (Gubanov, 1965). With the above assumptions, the large difference in the discontinuties of Hall coefficient and electrical resistivity are analysed in terms of the relations established in solids, taking into account both electrons and holes. The relative change in energy gap is found to be 20% and the number of holes produced by fusion is of the order 2 × 10 20 cm −3 . Some influence of defects due to stoichiometric deviations has been observed in the liquid state. This is a remarkable point which supports the use of conventional theories." @default.
- W1970590911 created "2016-06-24" @default.
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- W1970590911 date "1972-06-01" @default.
- W1970590911 modified "2023-09-27" @default.
- W1970590911 title "Transport properties of silver telluride Ag2Te at melting point and in the liquid state" @default.
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- W1970590911 doi "https://doi.org/10.1016/0022-3093(72)90149-4" @default.
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