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arXiv · 1411.1616

Kondo effect in a novel 5d quasi-skutterudite Yb3Os4Ge13

C. L. Yang·X. Wang·X. Zhang·D. S. Wu·M. Liu·P. Zheng·J. Y. Yao·Z. Z. Li·Y. F. Yang·Y. G. Shi·J. L. Luo·N. L. Wang
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Abstract

We report the crystal growth of a new compound, Yb3Os4Ge13, by using a Bi-flux method. X-ray diffraction measurement shows that it crystallizes in the quasi-skutterudite-type caged structure with a cubic space group of Pm-3n (No. 223). Magnetic measurements reveal almost fully localized Yb f-moments above 120 K. The resistivity exhibits a crossover from metallic to insulating behavior with a logarithmic increase below ~ 40 K. The specific heat coefficient shows a rapid upturn below ~5 K and exceeds 2 J mol-1 K-2 at 2 K. Our experimental analysis and electronic band structure calculations demonstrate that Yb3Os4Ge13 exhibits the Kondo effect due to strong hybridization of the localized Yb f-moments with the p-electrons of the surrounding Ge-cages.

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C. L. Yang, X. Wang, X. Zhang, D. S. Wu, M. Liu, P. Zheng, J. Y. Yao, Z. Z. Li, Y. F. Yang, Y. G. Shi, J. L. Luo, N. L. Wang. 2014-11-06. Kondo effect in a novel 5d quasi-skutterudite Yb3Os4Ge13. https://doi.org/10.1103/physrevb.91.075120

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