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However, the limited availability of material platforms severely hinders the research progress. Here, it reports the first experimental synthesis and measurement of high\u2010quality single crystal van der Waals transition\u2010metal dichalcogenide InNbS<jats:sub>2<\/jats:sub>, revealing it as a topological nodal line semimetal with coexisting superconductivity. The temperature\u2010dependent measurements of magnetization susceptibility and electrical transport show that InNbS<jats:sub>2<\/jats:sub> is a type\u2010II superconductor with a transition temperature <jats:italic>T<\/jats:italic><jats:sub>c<\/jats:sub> of 6 K. First\u2010principles calculations predict multiple topological nodal ring states close to the Fermi level in the presence of spin\u2013orbit coupling. Similar features are also observed in the as\u2010synthesized BiNbS<jats:sub>2<\/jats:sub> and PbNbS<jats:sub>2<\/jats:sub> samples. This work provides new material platforms ANbS<jats:sub>2<\/jats:sub> (A = In, Bi, and Pb) and uncovers their intriguing potential for exploring the interplay between superconductivity and band topology.<\/jats:p>","DOI":"10.1002\/smll.202305909","type":"journal-article","created":{"date-parts":[[2023,9,28]],"date-time":"2023-09-28T04:47:45Z","timestamp":1695876465000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["The Coexistence of Superconductivity and Topological Order in Van der Waals InNbS<sub>2<\/sub>"],"prefix":"10.1002","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9703-6365","authenticated-orcid":false,"given":"Bo","family":"Zheng","sequence":"first","affiliation":[{"name":"Department of Materials Science &amp; 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"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xukun","family":"Feng","sequence":"additional","affiliation":[{"name":"Research Laboratory for Quantum Materials Singapore University of Technology and Design  Singapore 487372 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bo","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Physics and CAS Key Laboratory of Strongly\u2010coupled Quantum Matter Physics University of Science and Technology of China  Hefei Anhui 230026 China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhanfeng","family":"Liu","sequence":"additional","affiliation":[{"name":"National Synchrotron Radiation Laboratory CAS Center for Excellence in Nanoscience University of Science and Technology of China  Hefei Anhui 230029 China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shasha","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Materials Science &amp; 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