First-order Raman spectra from In1-x-yGaxAlyAs epitaxial layers grown on InP substratesM. M. Bülbül, G. D. Farrant and S. R.P. SmithEur. Phys. J. B, 24 1 (2001) 3-6DOI: https://doi.org/10.1007/s100510170015