Calculation of Anharmonic Coupling Constants between Phonon Modes in GaAs
B. Kolad, A. Musiał and P. Machnikowski
Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
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Received: 7 06 2008;
We derive third-order anharmonic coupling constants between various phonon modes in a zinc-blende crystal of a binary compound using a valence force field model extended by adding Coulomb interactions between polarizable ions. We find and compare the anharmonic coupling between the zone-center LO phonon and other phonon modes along principal directions of a GaAs crystal.
DOI: 10.12693/APhysPolA.114.1167
PACS numbers:, 63.20.dh