title: Pressure-driven dome-shaped superconductivity and electronic structural evolution in tungsten ditelluride.
abstract: Tungsten ditelluride has attracted intense research interest due to the recent discovery of its large unsaturated magnetoresistance up to 60 T. Motivated by the presence of a small, sensitive Fermi surface of 5d electronic orbitals, we boost the electronic properties by applying a high pressure, and introduce superconductivity successfully. Superconductivity sharply appears at a pressure of 2.5 GPa, rapidly reaching a maximum critical temperature (Tc) of 7 K at around 16.8 GPa, followed by a monotonic decrease in Tc with increasing pressure, thereby exhibiting the typical dome-shaped superconducting phase. From theoretical calculations, we interpret the low-pressure region of the superconducting dome to an enrichment of the density of states at the Fermi level and attribute the high-pressure decrease in Tc to possible structural instability. Thus, tungsten ditelluride may provide a new platform for our understanding of superconductivity phenomena in transition metal dichalcogenides.
authors.affiliation: National Laboratory of Solid State Microstructures, College of Physics, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Xing-Chen
authors.initials: XC
authors.lastname: Pan
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.|High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230031, China.|Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Xuliang
authors.initials: X
authors.lastname: Chen
authors.affiliation: National Laboratory of Solid State Microstructures, College of Physics, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Huimei
authors.initials: H
authors.lastname: Liu
authors.affiliation: National Laboratory of Solid State Microstructures, College of Physics, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Yanqing
authors.initials: Y
authors.lastname: Feng
authors.affiliation: National Laboratory of Solid State Microstructures, College of Physics, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Zhongxia
authors.initials: Z
authors.lastname: Wei
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.|Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Yonghui
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.|High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230031, China.|Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Zhenhua
authors.initials: Z
authors.lastname: Chi
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.|High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Li
authors.initials: L
authors.lastname: Pi
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Yen
authors.affiliation: National Laboratory of Solid State Microstructures, College of Physics, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Fengqi
authors.initials: F
authors.lastname: Song
authors.affiliation: National Laboratory of Solid State Microstructures, College of Physics, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Xiangang
authors.initials: X
authors.lastname: Wan
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.|High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230031, China.|Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Zhaorong
authors.initials: Z
authors.lastname: Yang
authors.affiliation: National Laboratory of Solid State Microstructures, College of Physics, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Baigeng
authors.initials: B
authors.lastname: Wang
authors.affiliation: National Laboratory of Solid State Microstructures, College of Physics, Nanjing University, Nanjing 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Guanghou
authors.initials: G
authors.lastname: Wang
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.|High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Yuheng
authors.initials: Y
authors.lastname: Zhang