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A unique van Hove singularity in kagome superconductor CsV3-xTaxSb5 with enhanced superconductivity

Author

Listed:
  • Yang Luo

    (University of Science and Technology of China)

  • Yulei Han

    (Fuzhou University)

  • Jinjin Liu

    (Beijing Institute of Technology
    Beijing Institute of Technology)

  • Hui Chen

    (Chinese Academy of Sciences)

  • Zihao Huang

    (Chinese Academy of Sciences)

  • Linwei Huai

    (University of Science and Technology of China)

  • Hongyu Li

    (University of Science and Technology of China)

  • Bingqian Wang

    (University of Science and Technology of China)

  • Jianchang Shen

    (University of Science and Technology of China)

  • Shuhan Ding

    (University of Science and Technology of China)

  • Zeyu Li

    (University of Science and Technology of China)

  • Shuting Peng

    (University of Science and Technology of China)

  • Zhiyuan Wei

    (University of Science and Technology of China)

  • Yu Miao

    (University of Science and Technology of China)

  • Xiupeng Sun

    (University of Science and Technology of China)

  • Zhipeng Ou

    (University of Science and Technology of China)

  • Ziji Xiang

    (University of Science and Technology of China)

  • Makoto Hashimoto

    (SLAC National Accelerator Laboratory)

  • Donghui Lu

    (SLAC National Accelerator Laboratory)

  • Yugui Yao

    (Beijing Institute of Technology
    Beijing Institute of Technology)

  • Haitao Yang

    (Chinese Academy of Sciences)

  • Xianhui Chen

    (University of Science and Technology of China)

  • Hong-Jun Gao

    (Chinese Academy of Sciences)

  • Zhenhua Qiao

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Zhiwei Wang

    (Beijing Institute of Technology
    Beijing Institute of Technology
    Yangtze Delta Region Academy of Beijing Institute of Technology)

  • Junfeng He

    (University of Science and Technology of China)

Abstract

Van Hove singularity (VHS) has been considered as a driving source for unconventional superconductivity. A VHS in two-dimensional (2D) materials consists of a saddle point connecting electron-like and hole-like bands. In a rare case, when a VHS appears at Fermi level, both electron-like and hole-like conduction can coexist, giving rise to an enhanced density of states as well as an attractive component of Coulomb interaction for unconventional electronic pairing. However, this van Hove scenario is often destroyed by an incorrect chemical potential or competing instabilities. Here, by using angle-resolved photoemission measurements, we report the observation of a VHS perfectly aligned with the Fermi level in a kagome superconductor CsV3-xTaxSb5 (x ~ 0.4), in which a record-high superconducting transition temperature is achieved among all the current variants of AV3Sb5 (A = Cs, Rb, K) at ambient pressure. Doping dependent measurements reveal the important role of van Hove scenario in boosting superconductivity, and spectroscopic-imaging scanning tunneling microscopy measurements indicate a distinct superconducting state in this system.

Suggested Citation

  • Yang Luo & Yulei Han & Jinjin Liu & Hui Chen & Zihao Huang & Linwei Huai & Hongyu Li & Bingqian Wang & Jianchang Shen & Shuhan Ding & Zeyu Li & Shuting Peng & Zhiyuan Wei & Yu Miao & Xiupeng Sun & Zhi, 2023. "A unique van Hove singularity in kagome superconductor CsV3-xTaxSb5 with enhanced superconductivity," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39500-7
    DOI: 10.1038/s41467-023-39500-7
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    1. He Zhao & Hong Li & Brenden R. Ortiz & Samuel M. L. Teicher & Takamori Park & Mengxing Ye & Ziqiang Wang & Leon Balents & Stephen D. Wilson & Ilija Zeljkovic, 2021. "Cascade of correlated electron states in the kagome superconductor CsV3Sb5," Nature, Nature, vol. 599(7884), pages 216-221, November.
    2. M. J. Lawler & K. Fujita & Jhinhwan Lee & A. R. Schmidt & Y. Kohsaka & Chung Koo Kim & H. Eisaki & S. Uchida & J. C. Davis & J. P. Sethna & Eun-Ah Kim, 2010. "Intra-unit-cell electronic nematicity of the high-Tc copper-oxide pseudogap states," Nature, Nature, vol. 466(7304), pages 347-351, July.
    3. Hailan Luo & Qiang Gao & Hongxiong Liu & Yuhao Gu & Dingsong Wu & Changjiang Yi & Junjie Jia & Shilong Wu & Xiangyu Luo & Yu Xu & Lin Zhao & Qingyan Wang & Hanqing Mao & Guodong Liu & Zhihai Zhu & You, 2022. "Electronic nature of charge density wave and electron-phonon coupling in kagome superconductor KV3Sb5," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    4. C. Mielke & D. Das & J.-X. Yin & H. Liu & R. Gupta & Y.-X. Jiang & M. Medarde & X. Wu & H. C. Lei & J. Chang & Pengcheng Dai & Q. Si & H. Miao & R. Thomale & T. Neupert & Y. Shi & R. Khasanov & M. Z. , 2022. "Time-reversal symmetry-breaking charge order in a kagome superconductor," Nature, Nature, vol. 602(7896), pages 245-250, February.
    5. Hui Chen & Haitao Yang & Bin Hu & Zhen Zhao & Jie Yuan & Yuqing Xing & Guojian Qian & Zihao Huang & Geng Li & Yuhan Ye & Sheng Ma & Shunli Ni & Hua Zhang & Qiangwei Yin & Chunsheng Gong & Zhijun Tu & , 2021. "Roton pair density wave in a strong-coupling kagome superconductor," Nature, Nature, vol. 599(7884), pages 222-228, November.
    6. F. H. Yu & D. H. Ma & W. Z. Zhuo & S. Q. Liu & X. K. Wen & B. Lei & J. J. Ying & X. H. Chen, 2021. "Unusual competition of superconductivity and charge-density-wave state in a compressed topological kagome metal," Nature Communications, Nature, vol. 12(1), pages 1-6, December.
    7. Boqin Song & Tianping Ying & Xianxin Wu & Wei Xia & Qiangwei Yin & Qinghua Zhang & Yanpeng Song & Xiaofan Yang & Jiangang Guo & Lin Gu & Xiaolong Chen & Jiangping Hu & Andreas P. Schnyder & Hechang Le, 2023. "Anomalous enhancement of charge density wave in kagome superconductor CsV3Sb5 approaching the 2D limit," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    8. Yong Hu & Xianxin Wu & Brenden R. Ortiz & Sailong Ju & Xinloong Han & Junzhang Ma & Nicholas C. Plumb & Milan Radovic & Ronny Thomale & Stephen D. Wilson & Andreas P. Schnyder & Ming Shi, 2022. "Rich nature of Van Hove singularities in Kagome superconductor CsV3Sb5," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
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