Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-08-24
J. Phys.: Conf. Ser. 273 (2011) 012063
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 2 figures, to appear in Journal of Physics: Conference Series
Scientific paper
10.1088/1742-6596/273/1/012063
The drastic changes of Fermi surfaces as well as transport anomalies near P=Pc~2.35 GPa in CeRhIn5 are explained theoretically from the viewpoint of sharp valence change of Ce. It is pointed out that the key mechanism is the interplay of magnetic order and Ce-valence fluctuations. It is shown that the antiferromagnetic state with "small" Fermi surfaces changes to the paramagnetic state with "large" Fermi surfaces with huge enhancement of effective mass of electrons with keeping finite c-f hybridization. This naturally explains the de Haas-van Alphen measurement and also the transport anomalies of T-linear resistivity emerging simultaneously with the residual resistivity peak at P=Pc in CeRhIn5.
Miyake Kazumasa
Watanabe Shinji
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