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Tungsten ditelluride has attracted intense research interest due to therecent discovery of its large unsaturated magnetoresistance up to 60 Tesla.Motivated by the presence of a small, sensitive Fermi surface of 5d electronicorbitals, we boost the electronic properties by applying a high pressure, andintroduce superconductivity successfully. Superconductivity sharply appears ata pressure of 2.5 GPa, rapidly reaching a maximum critical temperature (Tc) of7 K at around 16.8 GPa, followed by a monotonic decrease in Tc with increasingpressure, thereby exhibiting the typical dome-shaped superconducting phase.From theoretical calculations, we interpret the low-pressure region of thesuperconducting dome to an enrichment of the density of states at the Fermilevel and attribute the high-pressure decrease in Tc to possible structuralinstability. Thus, Tungsten ditelluride may provide a new platform for ourunderstanding of superconductivity phenomena in transition metaldichalcogenides.

Pressure-driven dome-shaped superconductivity and electronic structural evolution in tungsten ditelluride