COHERENT HETEROSTRUCTURES WITH NONCUBIC COMPONENTS - STRAINS AND STRESSES FOR ARBITRARY INTERFACE ORIENTATIONS - THEORY AND APPLICATIONS

A method for calculating strain and stress tensors and the density of elastic energy in the framework of linear anisotropic elasticity theor y has been developed. The method is valid for arbitrary symmetries of conjugated crystals and arbitrary interface orientations. Both a cryst allographic tilt of an epitaxial layer with respect to the substrate a nd the phenomenon of layer triclinic distortion have been considered. The results are compared with experimental data. The method has been a lso used for an optimization of structural perfection of heterostructu res with non-cubic components.