Abstract:
Using X-ray structural analysis, scanning electron microscopy, atomic force microscopy, and photoluminescent spectroscopy, it is shown that it is possible to obtain a small-scale domain structure on the surface of liquid-phase epitaxial heterostructures. The domain structure emerges as a result of spinodal decomposition of the Ga$_x$In$_{1-x}$As$_y$P$_{1-y}$ – quaternary alloy due to immiscibility of its components and relaxation of its lattice parameter to surrounding layers.