Structure of two liquid semiconductors Ag1-xSexand Ag0.67Te0.33

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Abstract
Neutron diffraction measurements have been carried out on Ag1-xSex and Ag0.67Te0.33 alloys to investigate possible structural causes for the differences in electrical transport properties observed in the two alloys. Ag1-xSex was measured for the compositions, x=0.30, 0.33 and 0.36, at temperatures just above the liquidus (1045, 915 and 855 degrees C, respectively), and for x=0.33 at three temperatures (915, 985 and 1045 degrees C). The Ag1-xTex system was measured at only one composition x=0.33, just above the liquidus (985 degrees C). At the level of the average correlation function, the behaviour of liquid Ag-Se shows no unusual dependence on either concentration or temperature, and the selenium and tellurium alloys show generally similar behaviour. There is no obvious structural connection with the anomalous concentration dependence of the electrical conductivity in Ag1-xSex alloys or with the different behaviour in both electronic and ionic conduction observed in the Ag-Se and Ag-Te systems.

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