Phase transitions in ZnTe co‐doped with Mg and oxygen

Abstract

Self-assembling of 1O4Mg tetrahedral clusters in ZnTe isoelectronically co-doped with Mg and oxygen in the ultra dilute oxygen impurity limit is described by a phase diagram. The occurrence of 1O4Mg clusters is a result of the second-order transition. The final stage of self-assembling when all oxygen impurities are in 1O4Mg clusters has to be reached also as a result of the second-order transition at the temperature close to the temperature of the occurrence of these clusters. The conditions of these phase transitions are obtained.

Nanoscale Order in ZnTe:(Cd, O)

“…The first one is the strain energy of quadruples of tetrahedral cells situated around central atoms of clusters or around isolated impurities. This item is calculated using the valence force field model by the approach developed for the estimation of the strain energy of III-V semiconductors ternary alloys [6]. The averages of the bond bending elastic constants of the compounds are used as elastic constants of the angles between the unlike bonds.…”