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Recently the metastable 1T′‐type VIB‐group transition metal dichalcogenides (TMDs) have attracted extensive attention due to their rich and intriguing physical properties, including superconductivity, valleytronics physics, and topological physics. Here, a new layered WS 2  dubbed “2M” WS 2 , is constructed from 1T′ WS 2  monolayers, is synthesized. Its phase is defined as 2M based on the number of layers in each unit cell and the subordinate crystallographic system. Intrinsic superconductivity is observed in 2M WS 2  with a transition temperature  T  c  of 8.8 K, which is the highest among TMDs not subject to any fine‐tuning process. Furthermore, the electronic structure of 2M WS 2  is found by Shubnikov–de Haas oscillations and first‐principles calculations to have a strong anisotropy. In addition, topological surface states with a single Dirac cone, protected by topological invariant Z 2 , are predicted through first‐principles calculations. These findings reveal that the new 2M WS 2  might be an interesting topological superconductor candidate from the VIB‐group transition metal dichalcogenides.

Discovery of Superconductivity in 2M WS 2 with Possible Topological Surface States