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Defect-induced valence instabilities in rare-earth semiconducting compounds

โœ Scribed by Y. Hammoud; J.C. Parlebas; F. Gautier


Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
550 KB
Volume
48
Category
Article
ISSN
0038-1098

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Phonon bound states in the mixed valence
โœ Hisao Jichu; Kyuya Baba; Tamifusa Matsuura; Yoshihiro Kuroda; A.D.S. Nagi ๐Ÿ“‚ Article ๐Ÿ“… 1985 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 283 KB

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