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Calculation of Anharmonic Coupling Constants between Phonon Modes in GaAs

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Kolad B., Musiał A., Machnikowski P.
Acta Physica Polonica A
|
2008
|
vol. 114
|
issue 5
1167-1172
EN
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.
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