Electrical Properties of Liquid Sn--Se Alloys

Abstract

The dependence of the electrical conductivity on concentration forliquid Sn_1-cSe_c alloys exhibited a sharp minimum and a broadmaximum at the composition c=0.5 and 2/3, respectively. The dependenceof the thermopower on concentration exhibited a typical { p-n} transitionat the stoichiometry SnSe. The electrical behaviour of liquidSn_1-cSe_c alloys with c ≤0.3 was explained by the decrease in theconduction electrons due to the formation of chemical bonds between Snand Se ions. The conductivity and thermopower near the stoichiometrySnSe were analyzed by using the equations derived from theKubo-Greenwood formula. The conductivity gap was about 0 eV forliquid Sn--Se alloys near the stoichiometry.