A Model of Valence Fluctuating Systems of Metallic Rare-Earth Compounds

概要

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A possibility is pointed out that two or more than two conduction bands playa role in metallic valence fluctuating systems ; the dispersion relations of theconduction bands have the same sign of tangent in the proposed model. Theseparation between conduction bands is one of essential parameters charac-terizing the system; the effective mass of quasi-particles is an increasing functionof the separation. A possibility is discussed that the density of states has a camelback structure around the chemical potential. There is also a peak around un-renormalized f levels. The effect of dilution of f sites, for example, the replacementof Ce atoms by La ones, on the resistivity is investigated. The residual resistivityis higher, as the separation between conduction bands is larger.
社団法人日本物理学会の論文
1984-05-15