| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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A New Superconductor Parent Compound NaMn$_{6}$Bi$_{5}$ with Quasi-One-Dimensional Structure and Lower Antiferromagnetic-Like Transition Temperatures |
| Ying Zhou1,2†, Long Chen1,2†, Gang Wang1,2,3*, Yu-Xin Wang1,2, Zhi-Chuan Wang1,2, Cong-Cong Chai1,2, Zhong-Nan Guo4, Jiang-Ping Hu1,2,3*, and Xiao-Long Chen1,2,3* |
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2University of Chinese Academy of Sciences, Beijing 100049, China
3Songshan Lake Materials Laboratory, Dongguan 523808, China
4Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
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| Cite this article: |
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Ying Zhou, Long Chen, Gang Wang et al 2022 Chin. Phys. Lett. 39 047401 |
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Abstract Mn-based superconductors are very rare and their superconductivity has only been reported in three-dimensional MnP and quasi-one-dimensional KMn$_{6}$Bi$_{5}$ and RbMn$_{6}$Bi$_{5}$ with [Mn$_{6}$Bi$_{5}$]$^{-}$ columns under high pressures. Here we report the synthesis, magnetism, electrical resistivity, and specific heat capacity of the newly discovered quasi-one-dimensional NaMn$_{6}$Bi$_{5}$. Compared with other $A$Mn$_{6}$Bi$_{5}$ ($A$ = K, Rb, and Cs), NaMn$_{6}$Bi$_{5}$ has abnormal Bi–Bi bond lengths and two antiferromagnetic-like transitions at 47.3 K and 51.8 K. Anisotropic resistivity and low-temperature non-Fermi liquid behavior are observed. Heat capacity measurement reveals that the Sommerfeld coefficient for NaMn$_{6}$Bi$_{5}$ is unusually large. Using first-principles calculations, an unusual enhancement of density of states near the Fermi level is demonstrated for NaMn$_{6}$Bi$_{5}$. The features make NaMn$_{6}$Bi$_{5}$ a more suitable platform to explore the interplay of magnetism and superconductivity.
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Received: 05 February 2022
Editors' Suggestion
Published: 09 March 2022
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| PACS: |
74.70.Dd
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(Ternary, quaternary, and multinary compounds)
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74.25.Fy
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74.25.Ha
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(Magnetic properties including vortex structures and related phenomena)
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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