ELECTRON-PHONON COUPLING IN MIXED-VALENCE SYSTEMS

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dc.contributor.authorRIVAS, M
dc.contributor.authorROSSLER, J
dc.contributor.authorKIWI, M
dc.date.accessioned2025-01-23T19:22:47Z
dc.date.available2025-01-23T19:22:47Z
dc.date.issued1991
dc.description.abstractThe electron-phonon interaction in mixed-valence systems is modeled on the basis of an Anderson-like Hamiltonian that describes a cluster of one metallic rare-earth cation surrounded by six anions. Coupling between the electronic and phononic variables is introduced, keeping two different phonon modes: a breathing and an asymmetric mode. The first, related to the ionic radius, is treated exactly. The asymmetric mode, which determines the sd-f hybridization, is dealt with in the Born-Oppenheimer approximation. A variety of experimental results are adequately accounted for by this simple model, like the anomalous thermal expansion, the Debye-Waller factor, the phonon softening and broadening, and the charge-distance correlation.
dc.fuente.origenWOS
dc.identifier.issn0163-1829
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/99104
dc.identifier.wosidWOS:A1991FF08600058
dc.issue.numero4
dc.language.isoen
dc.pagina.final3600
dc.pagina.inicio3593
dc.revistaPhysical review b
dc.rightsacceso restringido
dc.subject.ods07 Affordable and Clean Energy
dc.subject.odspa07 Energía asequible y no contaminante
dc.titleELECTRON-PHONON COUPLING IN MIXED-VALENCE SYSTEMS
dc.typeartículo
dc.volumen43
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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