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Realization of Heavy Local Fermi Liquid and Non-Fermi Liquid in f$^2$ Crystalline-Electric-Field Singlet-Triplet Configuration

Kazumasa Hattori·Kazumasa Miyake
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Abstract

Using the numerical renormalization group method, we investigate an extended Anderson model, in which correlated electrons with the $Γ_1$(singlet)-$\Gamma4$(triplet) f$^2$ crystalline-electric-field (CEF) configuration hybridize with conduction electrons of $Γ_7$(doublet) and $Γ_8$ (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.

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Kazumasa Hattori, Kazumasa Miyake. 2005-09-14. Realization of Heavy Local Fermi Liquid and Non-Fermi Liquid in f$^2$ Crystalline-Electric-Field Singlet-Triplet Configuration. https://doi.org/10.1143/jpsj.74.2193

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