Electronic properties of liquid SbSe and BiSe alloys

Abstract

The electrical conductivity (a), the magnetic susceptibility (x), and the thermoelectric power (8) of liquid Sb-Se and Bi-Se alloys are measured as function of composition in the temperature range from the melting point to about 1000 "C. On adding Se to Sb and Bi G indicates a rapid fall and x has a sharp maximum of diamagnetism at the stoichiometric composition of M,Se, in both the systems. A reversion of the sign of S is observed around the composition of Sb,Se, in liquid Sb-Se alloys, while S in liquid Bi-Se alloys remains negative over a wide composition range including Bi,Se,. The calculated value of g (the ratio of real and free electron density of states a t the Fermi level) using the observed values of a begins t o decrease in the vicinity of 50 atyo Se and drops sharply at the concentration of 60 atyo Se in both systems. Electronic properties obtained are discussed in the light of current transport theories employed in liquid semiconductors.