We show the possibility of the formation of two-phonon bound states which give rise to a localized phonon mode like the one discovered recently in the compound Sm0.75Y0.25 S. A crucial point in our model is to take account of an indirect two-phonon interaction due to local lattice-distortions around
Spatial correlations of rare-earth ions in mixed-valence systems
β Scribed by A. Sakurai; P. Schlottmann
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 275 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0038-1098
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