We propose a ‘one bond→two modes’ model for the long wavelength optical phonons in random zinc-blende AxB1−xC ternary alloys, based on the percolation site theory. Our model takes into account the ‘fractal→normal’ object transition, which goes with the ‘dispersion→continuum’ topology transition at the percolation thresholds of the A–C and B–C bonds. We first introduce the basics of our model in the case of Zn1−xBex(Se,Te) mixed crystals, whose parent binaries display a high contrast in the bond stiffness, which enhances the percolation effects. We then focus our study on standard systems, which display a much weaker contrast in the bond stiffness. The multi-phonon behavior of GaInAs alloys is re-examined in the light of the percolation model, with much success.
- Percolation picture for long wavelength phonons in zinc blende alloys: application to GaInAs
- O. Pagès - Laboratoire d'Étude des Microstructures et de Mécanique des MatériauxT. Tite - Laboratoire d'Étude des Microstructures et de Mécanique des MatériauxA. Chafi - Laboratoire d'Étude des Microstructures et de Mécanique des MatériauxJ. Gleize - Laboratoire d'Étude des Microstructures et de Mécanique des MatériauxJ.P. Laurenti - Laboratoire d'Étude des Microstructures et de Mécanique des MatériauxJ. Hugel - Laboratoire d'Étude des Microstructures et de Mécanique des MatériauxA.V. Postnikov - M.N. Mikheev Institute of Metal PhysicsE. Tournié - Université de Montpellier, IES - Institut d'Electronique et des SystèmesO. Maksimov - City College of New YorkM.C. Tamargo - City College of New York
- Journal of Physics and Chemistry of Solids, Vol.66(11), pp.2094-2098
- International Conference on Ternary and Multinary Compounds (ICTMC) 14 (Denver, United States, 2004)
- 99245239409311
- IES - Institut d'Electronique et des Systèmes
- English
- Conference proceeding
- hal-05638946