journal article·2024-02Open access

The Coexistence of Superconductivity and Topological Order in Van der Waals InNbS2

Bo Zheng, Xukun Feng, Bo Liu, Zhanfeng Liu, Shasha Wang, Ying Zhang, Xiang Ma, Yang Luo, Changlong Wang, Ruimin Li, Zeying Zhang, Shengtao Cui, Yalin Lu, Zhe Sun, Junfeng He, Shengyuan A. Yang, Bin Xiang

Small· Volume 20· Issue 5

Abstract

Abstract The research on systems with coexistence of superconductivity and nontrivial band topology has attracted widespread attention. However, the limited availability of material platforms severely hinders the research progress. Here, it reports the first experimental synthesis and measurement of high‐quality single crystal van der Waals transition‐metal dichalcogenide InNbS2, revealing it as a topological nodal line semimetal with coexisting superconductivity. The temperature‐dependent measurements of magnetization susceptibility and electrical transport show that InNbS2 is a type‐II superconductor with a transition temperature Tc of 6 K. First‐principles calculations predict multiple topological nodal ring states close to the Fermi level in the presence of spin–orbit coupling. Similar features are also observed in the as‐synthesized BiNbS2 and PbNbS2 samples. This work provides new material platforms ANbS2 (A = In, Bi, and Pb) and uncovers their intriguing potential for exploring the interplay between superconductivity and band topology.
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Research context

OpenAlex topics: Topological Materials and Phenomena · 2D Materials and Applications · Graphene research and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science & Engineering CAS Key Lab of Materials for Energy Conversion Anhui Laboratory of Advanced Photon Science and Technology University of Science and Technology of China Hefei 230026 China

Research Laboratory for Quantum Materials Singapore University of Technology and Design Singapore 487372 Singapore

Department of Physics and CAS Key Laboratory of Strongly‐coupled Quantum Matter Physics University of Science and Technology of China Hefei Anhui 230026 China

National Synchrotron Radiation Laboratory CAS Center for Excellence in Nanoscience University of Science and Technology of China Hefei Anhui 230029 China

College of Mathematics and Physics Beijing University of Chemical Technology Beijing 100029 China

Funding

National Synchrotron Radiation Laboratory · University of Science and Technology of China Center for Micro- and Nanoscale Research and Fabrication

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