M. Grun et al., STRAIN RELIEF AND GROWTH MODES IN WURTZITE TYPE EPITAXIAL LAYERS OF CDSE AND CDS AND IN CDSE CDS SUPERLATTICES/, Journal of crystal growth, 138(1-4), 1994, pp. 150-154
The relaxation of the mismatch-induced strain in (0001) wurtzite type
epilayers of CdSe and CdS and of related superlattices on GaAs(111) is
discussed. For CdSe/GaAs(111), high-resolution electron microscopy sh
ows that the misfit dislocations are 60-degrees dislocations, the glid
e of which is limited to the plane parallel to the interface. The epil
ayers are therefore free of in-grown threading arms. The thickness of
that region in the layer, which is significantly strained, is found to
be larger in case of a two-dimensional growth mode than in case of a
three-dimensional one.