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Charge-transfer soft-phonon model of mixed valence in rare-earth compounds

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
102
Identifiers
DOI: 10.1016/0009-2614(83)87392-8

Abstract

Abstract Mixed-valence compounds are divided into two classes. Class I includes materials in which charge transfer from a ligand orbital to one of the rare-earth atom valence orbitals occurs along with production of a soft phonon (via electron-phonon interaction) at a given transition temperature. In class II materials, the lattice is dynamically stable and the soft phonon does not occur.

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