title: Pressure-induced superconductivity in a three-dimensional topological material ZrTe5.
abstract: As a new type of topological materials, ZrTe5 shows many exotic properties under extreme conditions. Using resistance and ac magnetic susceptibility measurements under high pressure, while the resistance anomaly near 128 K is completely suppressed at 6.2 GPa, a fully superconducting transition emerges. The superconducting transition temperature Tc increases with applied pressure, and reaches a maximum of 4.0 K at 14.6 GPa, followed by a slight drop but remaining almost constant value up to 68.5 GPa. At pressures above 21.2 GPa, a second superconducting phase with the maximum Tc of about 6.0 K appears and coexists with the original one to the maximum pressure studied in this work. In situ high-pressure synchrotron X-ray diffraction and Raman spectroscopy combined with theoretical calculations indicate the observed two-stage superconducting behavior is correlated to the structural phase transition from ambient Cmcm phase to high-pressure C2/m phase around 6 GPa, and to a mixture of two high-pressure phases of C2/m and P-1 above 20 GPa. The combination of structure, transport measurement, and theoretical calculations enable a complete understanding of the emerging exotic properties in 3D topological materials under extreme environments.
authors.affiliation: High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China; Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
authors.forename: Yonghui
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China;
authors.forename: Juefei
authors.initials: J
authors.lastname: Wu
authors.affiliation: High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China;
authors.forename: Wei
authors.initials: W
authors.lastname: Ning
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China;
authors.forename: Nana
authors.initials: N
authors.lastname: Li
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China;
authors.forename: Yongping
authors.initials: Y
authors.lastname: Du
authors.affiliation: High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China; Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
authors.forename: Xuliang
authors.initials: X
authors.lastname: Chen
authors.affiliation: High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China;
authors.forename: Ranran
authors.initials: R
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
authors.forename: Zhenhua
authors.initials: Z
authors.lastname: Chi
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
authors.forename: Xuefei
authors.initials: X
authors.lastname: Wang
authors.affiliation: High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China;
authors.forename: Xiangde
authors.initials: X
authors.lastname: Zhu
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China;
authors.forename: Pengchao
authors.initials: P
authors.lastname: Lu
authors.affiliation: High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439;
authors.forename: Cheng
authors.initials: C
authors.lastname: Ji
authors.affiliation: National Laboratory of Solid State Microstructures, School 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: High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China; Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China; zryang@issp.ac.cn jiansun@nju.edu.cn yangwg@hpstar.ac.cn tianml@hmfl.ac.cn hmao@carnegiescience.edu.
authors.forename: Zhaorong
authors.initials: Z
authors.lastname: Yang
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China; zryang@issp.ac.cn jiansun@nju.edu.cn yangwg@hpstar.ac.cn tianml@hmfl.ac.cn hmao@carnegiescience.edu.
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China; High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439; zryang@issp.ac.cn jiansun@nju.edu.cn yangwg@hpstar.ac.cn tianml@hmfl.ac.cn hmao@carnegiescience.edu.
authors.forename: Wenge
authors.initials: W
authors.lastname: Yang
authors.affiliation: High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China; Hefei Science Center, Chinese Academy of Sciences, Hefei 230031, China; zryang@issp.ac.cn jiansun@nju.edu.cn yangwg@hpstar.ac.cn tianml@hmfl.ac.cn hmao@carnegiescience.edu.
authors.forename: Mingliang
authors.initials: M
authors.lastname: Tian
authors.affiliation: High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;
authors.forename: Yuheng
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China; Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015 zryang@issp.ac.cn jiansun@nju.edu.cn yangwg@hpstar.ac.cn tianml@hmfl.ac.cn hmao@carnegiescience.edu.
authors.forename: Ho-Kwang
authors.initials: HK
authors.lastname: Mao
keywords: Dirac semimetals; high pressure; superconductivity; synchrotron X-ray diffraction