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arXiv · 2305.08669

Synthesis and physical properties of Ce$_2$Rh$_{3+\delta}$Sb$_4$ single crystals

Kangqiao Cheng·Shuo Zou·Huanpeng Bu·Jiawen Zhang·Shijie Song·Hanjie Guo·Huiqiu Yuan·Yongkang Luo
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Abstract

Millimeter-sized Ce$_2$Rh$_{3+\delta}$Sb$_4$ ($\delta\approx 1/8$) single crystals were synthesized by a Bi-flux method and their physical properties were studied by a combination of electrical transport, magnetic and thermodynamic measurements. The resistivity anisotropy $\rho_{a,b}/\rho_{c}\sim2$, manifesting a quasi-one-dimensional electronic character. Magnetic susceptibility measurements confirm $\mathbf{ab}$ as the magnetic easy plane. A long-range antiferromagnetic transition occurs at $T_N=1.4$ K, while clear short-range ordering can be detected well above $T_N$. The low ordering temperature is ascribed to the large Ce-Ce distance as well as the geometric frustration. Kondo scale is estimated to be about 2.4 K, comparable to the strength of magnetic exchange. Ce$_2$Rh$_{3+\delta}$Sb$_4$, therefore, represents a rare example of dense Kondo lattice whose Ruderman-Kittel-Kasuya-Yosida exchange and Kondo coupling are both weak but competing.

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Kangqiao Cheng, Shuo Zou, Huanpeng Bu, Jiawen Zhang, Shijie Song, Hanjie Guo, Huiqiu Yuan, Yongkang Luo. 2023-05-15. Synthesis and physical properties of Ce$_2$Rh$_{3+\delta}$Sb$_4$ single crystals. https://doi.org/10.1103/physrevmaterials.7.084404

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