Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-09-14
J. Phys. Soc. Jpn. 74 (2005) 2193
Physics
Condensed Matter
Strongly Correlated Electrons
9 pages, 5 figures
Scientific paper
10.1143/JPSJ.74.2193
Using the numerical renormalization group method, we investigate an extended Anderson model, in which correlated electrons with the $\Gamma_1$(singlet)-$\Gamma4$(triplet) f$^2$ crystalline-electric-field (CEF) configuration hybridize with conduction electrons of $\Gamma_7$(doublet) and $\Gamma_8$ (quartet) under cubic $O_h$ symmetry, from a strong spin-orbit interaction limit. For the case of the parameters relevant to PrFe4P12, the system is under competition between the CEF singlet fixed point and the multichannel Kondo non-Fermi liquid fixed point arising from the quadrupolar coupling between the impurity with pseudospin 1 and the conduction electron with pseudospin 3/2 . We consider that this result reveals the origin of the heaviness of the effective mass and non-Fermi liquid behavior of the Pr- based filled skutterudite compounds.
Hattori Kazumasa
Miyake Kazumasa
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