A new quasi-one-dimensional superconductor parent compound NaMn$_6$Bi$_5$ with lower antiferromagnetic transition temperatures

Ying Zhou; Long Chen; Gang Wang; Yuxin Wang; Zhichuan Wang; Congcong Chai; Zhongnan Guo3; Jiangping Hu; Xiaolong Chen

doi:10.1088/0256-307X/39/4/047401

paper

A new quasi-one-dimensional superconductor parent compound NaMn $_{6}$ Bi $_{5}$ with lower antiferromagnetic transition temperatures

arXiv:2201.10719 · doi:10.1088/0256-307X/39/4/047401

Abstract

Mn-based superconductor is rare and recently reported in quasi-one-dimensional KMn $_{6}$ Bi $_{5}$ with [Mn $_{6}$ Bi $_{5}$ ]-columns under high pressure. Here we report the synthesis, magnetic properties, electrical resistivity, and specific heat capacity of the newly-discovered quasi-one-dimensional NaMn $_{6}$ Bi $_{5}$ single crystal. Compared with other AMn $_{6}$ Bi $_{5}$ (A = K, Rb, and Cs), NaMn $_{6}$ Bi $_{5}$ has larger intra-column Bi-Bi bond length, which may result in the two decoupled antiferromagnetic transitions at 47.3 K and 52.3 K. The relatively lower antiferromagnetic transition temperatures make NaMn $_{6}$ Bi $_{5}$ a more suitable platform to explore Mn-based superconductors. Anisotropic resistivity and non-Fermi liquid behavior at low temperature are observed. Heat capacity measurement reveals that NaMn $_{6}$ Bi $_{5}$ has similar Debye temperature with those of AMn $_{6}$ Bi $_{5}$ (A = K and Rb), whereas the Sommerfeld coefficient is unusually large. Using first-principles calculations, the quite different density of states and an unusual enhancement near the Fermi level are observed for NaMn $_{6}$ Bi $_{5}$ , when compared with those of other AMn $_{6}$ Bi $_{5}$ (A = K, Rb, and Cs) compounds.

19 pages,9 figures,2 tables

A new quasi-one-dimensional superconductor parent compound NaMn $_{6}$ Bi $_{5}$ with lower antiferromagnetic transition temperatures

Abstract

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A new quasi-one-dimensional superconductor parent compound NaMn6​Bi5​ with lower antiferromagnetic transition temperatures

Abstract

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Cited by in corpus (2)

A new quasi-one-dimensional superconductor parent compound NaMn $_{6}$ Bi $_{5}$ with lower antiferromagnetic transition temperatures