Unification of the phonon mode behavior in semiconductor alloys: Theory and<i>ab initio</i>calculations
Unification of the phonon mode behavior in semiconductor alloys: Theory and<i>ab initio</i>calculations
We demonstrate how to overcome serious problems in understanding and classification of vibration spectra in semiconductor alloys, following from traditional use of the virtual crystal approximation (VCA). We show that such different systems as InGaAs (1-$\text{bond}\ensuremath{\rightarrow}1$-mode behavior), InGaP (modified 2-mode), and ZnTeSe (2-$\text{bond}\ensuremath{\rightarrow}1$-mode) obey, in fact, the same phonon mode …