Author
Listed:
- Yi Liu
(Zhejiang University
Zhejiang University of Technology)
- Zi-Yi Liu
(Chinese Academy of Sciences
University of Chinese Academy of Sciences)
- Jin-Ke Bao
(Hangzhou Normal University
Shanghai University)
- Peng-Tao Yang
(Chinese Academy of Sciences
University of Chinese Academy of Sciences)
- Liang-Wen Ji
(Zhejiang University)
- Si-Qi Wu
(Zhejiang University)
- Qin-Xin Shen
(Chinese Academy of Sciences
University of Chinese Academy of Sciences)
- Jun Luo
(Chinese Academy of Sciences)
- Jie Yang
(Chinese Academy of Sciences)
- Ji-Yong Liu
(Zhejiang University)
- Chen-Chao Xu
(Hangzhou Normal University)
- Wu-Zhang Yang
(Westlake University)
- Wan-Li Chai
(Zhejiang University)
- Jia-Yi Lu
(Zhejiang University)
- Chang-Chao Liu
(Zhejiang University)
- Bo-Sen Wang
(Chinese Academy of Sciences
University of Chinese Academy of Sciences)
- Hao Jiang
(Xiangtan University)
- Qian Tao
(Zhejiang University)
- Zhi Ren
(Westlake University)
- Xiao-Feng Xu
(Zhejiang University of Technology)
- Chao Cao
(Zhejiang University
Zhejiang University)
- Zhu-An Xu
(Zhejiang University
Zhejiang University
Nanjing University)
- Rui Zhou
(Chinese Academy of Sciences)
- Jin-Guang Cheng
(Chinese Academy of Sciences
University of Chinese Academy of Sciences)
- Guang-Han Cao
(Zhejiang University
Zhejiang University
Nanjing University)
Abstract
Superconductivity in a highly correlated kagome system has been theoretically proposed for years (refs. 1–5), yet the experimental realization is hard to achieve6,7. The recently discovered vanadium-based kagome materials8, which exhibit both superconductivity9–11 and charge-density-wave orders12–14, are nonmagnetic8,9 and weakly correlated15,16. Thus these materials are unlikely to host the exotic superconductivity theoretically proposed. Here we report the discovery of a chromium-based kagome metal, CsCr3Sb5, which is contrastingly featured with strong electron correlations, frustrated magnetism and characteristic flat bands close to the Fermi level. Under ambient pressure, this kagome metal undergoes a concurrent structural and magnetic phase transition at 55 K, with a stripe-like 4a0 structural modulation. At high pressure, the phase transition evolves into two transitions, possibly associated with charge-density-wave and antiferromagnetic spin-density-wave orderings. These density-wave-like orders are gradually suppressed with pressure and, remarkably, a superconducting dome emerges at 3.65–8.0 GPa. The maximum of the superconducting transition temperature, Tcmax = 6.4 K, appears when the density-wave-like orders are completely suppressed at 4.2 GPa, and the normal state exhibits a non-Fermi-liquid behaviour, reminiscent of unconventional superconductivity and quantum criticality in iron-based superconductors17,18. Our work offers an unprecedented platform for investigating superconductivity in correlated kagome systems.
Suggested Citation
Yi Liu & Zi-Yi Liu & Jin-Ke Bao & Peng-Tao Yang & Liang-Wen Ji & Si-Qi Wu & Qin-Xin Shen & Jun Luo & Jie Yang & Ji-Yong Liu & Chen-Chao Xu & Wu-Zhang Yang & Wan-Li Chai & Jia-Yi Lu & Chang-Chao Liu & , 2024.
"Superconductivity under pressure in a chromium-based kagome metal,"
Nature, Nature, vol. 632(8027), pages 1032-1037, August.
Handle:
RePEc:nat:nature:v:632:y:2024:i:8027:d:10.1038_s41586-024-07761-x
DOI: 10.1038/s41586-024-07761-x
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