MODELING OF MECHANICAL-PROPERTIES OF II-VI MATERIALS

This paper reviews some new developments in the theory of alloy correlations, order-disorder transitions, and solidus phase-transition curves. It is argued that semiconductor alloys are never truly random, and the various phenomena that drive deviations from random arrangements are introduced. Likely consequences of correlations on the ability to fine-tune the lattice match of epitaxial layers to substrates, on vacancy formation, on diffusion, and on vapor-phase crystal growth are discussed. Examples are chosen for the alloys Hg//1// minus //xCd//xTe, Hg//1// minus //xZn//xTe, Cd//1// minus //yZn//yTe, and CdSe//1// minus //yTe//y.