Multipole Fluctuations in Filled Skutterudites

Details Multipole Fluctuations in Filled Skutterudites Multipole Fluctuations in Filled Skutterudites

2005-07-05

arxiv.org/abs/cond-mat/0507100v1

J. Phys. Soc. Jpn. 74, 2425 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1016/j.physb.2006.01.003

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.

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