On the spinodal decomposition of In$_{x}$Ga$_{1 - x}$N$_{y}$As$_{1 - y}$ and GaSb$_{x}$N$_{y}$As$_{1 - x - y}$ alloys

Abstract

Spinodal decomposition ranges of GaAs-enriched $\mbox{GaSb}_x \mbox{N}_y \mbox{As}_{1 - x - y} $ and $\mbox{In}_x \mbox{Ga}_{1 - x} \mbox{N}_y \mbox{As}_{1 - y} $ quaternary alloys as the result of the transformations of the bonds, strain and coherency strain energies at the phase separation are described. The alloys are represented as strictly regular solutions. The spinodal decomposition ranges of the alloys are demonstrated up to 600$^{\circ}$C. It is shown that $\mbox{GaSb}_x \mbox{N}_y \mbox{As}_{1 - x - y} $ alloys having one mixed sublattice are more promising from the standpoint of spinodal decomposition than $\mbox{In}_x \mbox{Ga}_{1 - x} \mbox{N}_y \mbox{As}_{1 - y} $ alloys with two mixed sublattices.