Phonon-Mediated Attractive Interaction between Adjacent f Electrons in Heavy-Electron Superconductors
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概要
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An electron-phonon interaction in Kondo lattices is theoretically investigated. It issignificantly screened by the Kondo effect, while the Thomas-l'ermi type screening isweak in spite of a large specific heat coefficient. These features are owing to the reduc-tion of the charge susceptibility by the Kondo effect. It is argued that the attractive interaction between adjacent f electrons due to one-phonon exchange can overcome theon-site repulsive interaction due to Coulomb correlation for reasonable values ofphysical parameters, when ligands are composed of many ions, i.e., clusters, andmodes besides the center of mass contribute to one-phonon exchange.
- 社団法人日本物理学会の論文
- 1987-02-15
著者
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Ohkawa Fusayoshi
Department Of Physics Faculty Of Science University Of Tokyo
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OHKAWA Fusayoshi
Department of Physics,Hokkaido University
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