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CeAu2In4: A candidate of quasi-one-dimensional antiferromagnetic Kondo lattice |
| Meng Lyu(吕孟)1,2, Hengcan Zhao(赵恒灿)1, Jiahao Zhang(张佳浩)1,2, Zhen Wang(王振)1,2, Shuai Zhang(张帅)1,2, and Peijie Sun(孙培杰)1,2,3,† |
1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Songshan Lake Materials Laboratory, Dongguan 523808, China |
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Abstract Needle-like single crystals of CeAu2In4 have been grown from In flux and characterized as a new candidate of quasi-one-dimensional Kondo lattice compound by crystallographic, magnetic, transport, and specific-heat measurements down to very low temperatures. We observe an antiferromagnetic transition at TN ≈ 0.9 K, a highly non-mean-field profile of the corresponding peak in specific heat, and a large Sommerfeld coefficient γ =369 mJ·mol-1·K-2. The Kondo temperature TK is estimated to be 1.1 K, being low and comparable to TN. While Fermi liquid behavior is observed deep into the magnetically ordered phase, the Kadowaki-Woods ratio is much reduced relative to the expected value for Ce compounds with Kramers doublet ground state. Markedly, this feature shares striking similarities to that of the prototypical quasi-one-dimensional compounds YbNi4P2 and CeRh6Ge4 with tunable ferromagnetic quantum critical point. Given the shortest Ce-Ce distance along the needle direction, CeAu2In4 appears to be an interesting model system for exploring antiferromagnetic quantum critical behaviors in a quasi-one-dimensional Kondo lattice with enhanced quantum fluctuations.
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Received: 28 April 2021
Revised: 07 June 2021
Accepted manuscript online: 11 June 2021
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PACS:
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71.27.+a
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(Strongly correlated electron systems; heavy fermions)
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71.20.Eh
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(Rare earth metals and alloys)
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72.15.-v
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(Electronic conduction in metals and alloys)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11774404 and 52088101), the National Key R&D Program of China (Grant No. 2017YF A0303100), and the Chinese Academy of Sciences through the Strategic Priority Research Program (Grant No. XDB33000000). |
Corresponding Authors:
Peijie Sun
E-mail: pjsun@iphy.ac.cn
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Cite this article:
Meng Lyu(吕孟), Hengcan Zhao(赵恒灿), Jiahao Zhang(张佳浩), Zhen Wang(王振), Shuai Zhang(张帅), and Peijie Sun(孙培杰) CeAu2In4: A candidate of quasi-one-dimensional antiferromagnetic Kondo lattice 2021 Chin. Phys. B 30 087101
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