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Crystalline Electric Field and Kondo Effect in SmOs4Sb12
Mombetsu, S.; Yanagisawa, T.; Hidaka, H.; Amitsuka, H.; Yasin, S.; Zherlitsyn, S.; Wosnitza, J.; Ho, P.-C.; Maple, M. B.
Our ultrasound results obtained in pulsed magnetic fields show that the filled-skutterudite compound SmOs4Sb12 has the Γ67 quartet crystalline-electric-field ground state. This fact suggests that the multipolar degrees of freedom of the Γ quartet play an important role in the unusual physical properties of this material. On the other hand, the elastic Response below ≈20 T cannot be explained using the localized 4f-electron model, which does not take into account the Kondo effect or ferromagnetic ordering. The analysis result suggests the presence of a Kondo-like screened state at low magnetic fields and its suppression at high magnetic fields above 20 T even at low temperatures.
Journal of the Physical Society of Japan 85(2016), 043704
Cited 2 times in Scopus
Contribution to WWW
arXiv:1603.09069 [cond-mat.str-el]: https://arxiv.org/abs/1603.09069