Spinodal decomposition range of InxGa1-xNyAs1-y alloys

Spinodal decomposition range of InxGa1-xNyAs1-y quaternary alloys as the result of the strain and coherency strain energies, transformations of the bonds, and a lattice mismatch between the GaAs substrate and an alloy is described. The alloys are considered in the strictly regular approximation. The strain energy is presented in the valence-force field model. The spinodal decomposition temperatures of InxGa1-xNyAs1-y alloys are demonstrated up to 1000 degreesC. It is shown that nitrogen dramatically increases the temperature of the coherent spinodal. (C) 2002 American Institute of Physics.