Gutzwiller Method for an Extended Periodic Anderson Model with the c-f Coulomb Interaction

Details Gutzwiller Method for an Extended Periodic Anderson Model with the c-f Coulomb Interaction Gutzwiller Method for an Extended Periodic Anderson Model with the c-f Coulomb Interaction

2011-08-16

arxiv.org/abs/1108.3132v2

J. Phys. Soc. Jpn. 80, 114711 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 7 figures

Scientific paper

10.1143/JPSJ.80.114711

We study an extended periodic Anderson model with the Coulomb interaction Ucf between conduction and f electrons by the Gutzwiller method. The crossovers between the Kondo, intermediate-valence, and almost empty f-electron regimes become sharper with Ucf, and for a sufficiently large Ucf, become first-order phase transitions. In the Kondo regime, a large enhancement in the effective mass occurs as in the ordinary periodic Anderson model without Ucf. In addition, we find that a large mass enhancement also occurs in the intermediate-valence regime by the effect of Ucf.

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