Defect structure of Cdhyphen;doped PbTe

摘要

Hallhyphen;effect and solubility measurements are carried out on Cdhyphen;doped PbTe crystals equilibrated with (Pb,Cd) alloys of various compositions atT=700 and 800thinsp;deg;C and quenched to room temperature. In Pbhyphen;saturated conditions, while most of the Cd is found to be incorporated as neutral Cd on Pb sites CdxPb, a fraction of the total amount of Cd is present as positively charged interstitial species Cdicompensated by electrons. A complete defect model which can predict the behavior of Cdhyphen;doped PbTe in Cdhyphen;rich atmospheres as well as in Tehyphen;rich atmospheres is proposed.