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- W2000643951 abstract "We study the mass enhancement in an extended periodic Anderson model with the Coulomb interaction Ucf between conduction and f-electrons by the Gutzwiller method. In the Kondo regime, where the number of f electrons nf per site is almost one, the mass enhancement factor becomes large as in the ordinary periodic Anderson model without Ucf. In the intermediate-valence regime, we find that the mass enhancement factor becomes large for a large Ucf. As a result, the effective mass can vary nonmonotonically as a function of nf, which may be relevant to the experimental observations of CeCu2Si2 under pressure." @default.
- W2000643951 created "2016-06-24" @default.
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- W2000643951 date "2012-12-14" @default.
- W2000643951 modified "2023-10-14" @default.
- W2000643951 title "Mass enhancement in an extended periodic Anderson model with valence fluctuations" @default.
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- W2000643951 doi "https://doi.org/10.1088/1742-6596/391/1/012159" @default.
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