Observation of superconductivity in the noncentrosymmetric nodal chain semimetal Ba5In4Bi5

Yuzhe Ma; Yulong Wang; Yuxin Wang; Soham Manni; Qisheng Lin; Linlin Wang; Kun Jiang; Sergey L. Bud'ko; Paul C. Canfield; Gang Wang

arXiv · 2210.04159

Observation of superconductivity in the noncentrosymmetric nodal chain semimetal Ba5In4Bi5

Yuzhe Ma·Yulong Wang·Yuxin Wang·Soham Manni·Qisheng Lin·Linlin Wang·Kun Jiang·Sergey L. Bud'ko·Paul C. Canfield·Gang Wang

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Abstract

The combination with superconductivity and topological nontrivial band structure provides a promising route towards novel quantum states such as topological superconductivity. Here, we report the first observation of superconductivity (4.1 K) in Ba5In4Bi5 single crystal, a noncentrosymmetric topological semimetal featuring nodal chain loops at the high-symmetry points R and X. The magnetization, resistivity, and specific heat capacity measurements reveal that Ba5In4Bi5 is a moderately coupled type-II Bardeen-Cooper-Schrieffer superconductor. Bulk superconductivity is suggested from the magnetic susceptibility and specific heat measurements. The results show that Ba5In4Bi5 provides a new platform for exploring the relationship of superconductivity and topological nontrivial band topology.

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Yuzhe Ma, Yulong Wang, Yuxin Wang, Soham Manni, Qisheng Lin, Linlin Wang, Kun Jiang, Sergey L. Bud'ko, Paul C. Canfield, Gang Wang. 2022-10-09. Observation of superconductivity in the noncentrosymmetric nodal chain semimetal Ba5In4Bi5. https://arxiv.org/abs/2210.04159

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