Electrical transport in the Ge_1-xSe₂Sb_x system

DC conductivity measurements have been made in the Ge_1-xSe₂Sb_x system for different values of x(=0, 0.011, 0.014, 0.02) as a function of temperature and electric field. It is observed that the DC conductivity in the limited range of temperature can be treated as an activated process. DC conductivity activation energy is found to increase with the increase of temperature. DC conductivity is found to increase with the increase in the content of antimony in the basic system. Conductivity activation energy is found to decrease with increasing electric field. The results have been explained on the basis of a two-channel model.