Multipole Fluctuations in Filled Skutterudites

Abstract

In order to clarify exotic multipole properties of filled skutterudites, we evaluate multipole susceptibility for $n$=1$\sim$5, where $n$ is the local $f$-electron number, on the basis of a multiorbital Anderson model constructed using the $j$-$j$ coupling scheme. For $n$=1, magnetic fluctuations dominate over low-temperature electronic properties, while for $n$=2 and 4, electronic states are dominated by both magnetic and quadrupole fluctuations. For $n$=3 and 5, octupole fluctuations are found to be significant, depending on the crystalline electric field potential. We discuss possible relevance of the results to actual materials.

4 pages, 3 figures, JPSJ2.cls. To be published in J. Phys. Soc. Jpn

References in corpus (4)

• Quadrupolar effect and rattling motion in heavy fermion superconductor PrOs_4Sb_{12}
• Microscopic theory of multipole ordering in NpO2
• Microscopic Approach to Magnetism and Superconductivity of $f$-Electron Systems with Filled Skutterudite Structure
• Magnetic Fluctuations of Filled Skutterudites Emerging in the Transition Region between Singlet and Triplet States

Cited by in corpus (3)

• Kondo Effect in an Electron System with Dynamical Jahn-Teller Impurity
• Multipole Susceptibility of Multiorbital Anderson Model Coupled with Jahn-Teller Phonons
• Microscopic Aspects of Multipole Properties of Filled Skutterudites