Millimeter-sized Ce2Rh3+δSb4 (δ≈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 ρa,b/ρc∼2, manifesting a quasi-one-dimensional electronic character. Magnetic susceptibility measurements confirm ab as the magnetic easy plane. A long-range antiferromagnetic transition occurs at TN=1.4 K, while clear short-range ordering can be detected well above TN. 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. Ce2Rh3+δSb4, therefore, represents a rare example of dense Kondo lattice whose Ruderman-Kittel-Kasuya-Yosida exchange and Kondo coupling are both weak but competing.
@article{arxiv.2305.08669,
title = {Synthesis and physical properties of Ce$_2$Rh$_{3+\delta}$Sb$_4$ single crystals},
author = {Kangqiao Cheng and Shuo Zou and Huanpeng Bu and Jiawen Zhang and Shijie Song and Hanjie Guo and Huiqiu Yuan and Yongkang Luo},
journal= {arXiv preprint arXiv:2305.08669},
year = {2023}
}