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Anharmonic Coupling of Phonon Modes in Mixed Zn<sub><i>x</i></sub>Cd<sub>1−<i>x</i></sub>Se Crystals
39
Citations
12
References
1982
Year
Materials ScienceIi-vi SemiconductorPhonon ModesX Se PhononsEngineeringPhysicsOptical PropertiesSpectroscopyNatural SciencesCondensed Matter PhysicsQuantum MaterialsApplied PhysicsPhononTo‐phonon BehaviourSpectroscopic PropertySolid-state PhysicPhonon States
Abstract The vibrational properties of Zn x Cd 1– x Se phonons are studied using Raman scattering. The change of the LO‐phonon spectrum versus crystal composition is found to be of the one‐mode type. The TO‐phonon behaviour is much more complicated. It exhibits rather anomalous features in the line shape and TO‐mode frequency versus crystal composition as well as temperature. The above phenomena are interpreted in terms of the anharmonic coupling between TO‐mode and two‐ phonon states. This coupling is well described by the theory developed.
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