Abstract
Spinodal decomposition of the BxGayIn1−x−yAs quaternary alloys lattice-matched to the GaAs as the result of the internal deformation and coherency strain energies is described. The alloys are represented in the strictly regular approximation. The internal deformation energy is considered by the valence-force field model. The estimated bond-stretching and bond-bending elastic constants of BAs are αBAs=6.69×10−2 N/m and βBAs=1.81×10−2 N/m, respectively. Ranges of spinodal decomposition of the BxGayIn1−x−yAs quaternary alloys up to x⩽0.1 with and without coherency strain energy are demonstrated.
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