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Electronic nature of charge density wave and electron-phonon coupling in kagome superconductor KV3Sb5

Author

Listed:
  • Hailan Luo

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Qiang Gao

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Hongxiong Liu

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yuhao Gu

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Dingsong Wu

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Changjiang Yi

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Junjie Jia

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Shilong Wu

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Xiangyu Luo

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yu Xu

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Lin Zhao

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Qingyan Wang

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Hanqing Mao

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Guodong Liu

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Zhihai Zhu

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Youguo Shi

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Kun Jiang

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Jiangping Hu

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Zuyan Xu

    (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)

  • X. J. Zhou

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory
    Beijing Academy of Quantum Information Sciences)

Abstract

The Kagome superconductors AV3Sb5 (A = K, Rb, Cs) have received enormous attention due to their nontrivial topological electronic structure, anomalous physical properties and superconductivity. Unconventional charge density wave (CDW) has been detected in AV3Sb5. High-precision electronic structure determination is essential to understand its origin. Here we unveil electronic nature of the CDW phase in our high-resolution angle-resolved photoemission measurements on KV3Sb5. We have observed CDW-induced Fermi surface reconstruction and the associated band folding. The CDW-induced band splitting and the associated gap opening have been revealed at the boundary of the pristine and reconstructed Brillouin zones. The Fermi surface- and momentum-dependent CDW gap is measured and the strongly anisotropic CDW gap is observed for all the V-derived Fermi surface. In particular, we have observed signatures of the electron-phonon coupling in KV3Sb5. These results provide key insights in understanding the nature of the CDW state and its interplay with superconductivity in AV3Sb5 superconductors.

Suggested Citation

  • 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.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-021-27946-6
    DOI: 10.1038/s41467-021-27946-6
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    Cited by:

    1. Jiangang Yang & Xinwei Yi & Zhen Zhao & Yuyang Xie & Taimin Miao & Hailan Luo & Hao Chen & Bo Liang & Wenpei Zhu & Yuhan Ye & Jing-Yang You & Bo Gu & Shenjin Zhang & Fengfeng Zhang & Feng Yang & Zhimi, 2023. "Observation of flat band, Dirac nodal lines and topological surface states in Kagome superconductor CsTi3Bi5," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Ge He & Leander Peis & Emma Frances Cuddy & Zhen Zhao & Dong Li & Yuhang Zhang & Romona Stumberger & Brian Moritz & Haitao Yang & Hongjun Gao & Thomas Peter Devereaux & Rudi Hackl, 2024. "Anharmonic strong-coupling effects at the origin of the charge density wave in CsV3Sb5," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    3. Yigui Zhong & Shaozhi Li & Hongxiong Liu & Yuyang Dong & Kohei Aido & Yosuke Arai & Haoxiang Li & Weilu Zhang & Youguo Shi & Ziqiang Wang & Shik Shin & H. N. Lee & H. Miao & Takeshi Kondo & Kozo Okaza, 2023. "Testing electron–phonon coupling for the superconductivity in kagome metal CsV3Sb5," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    4. Shuvam Sarkar & Joydipto Bhattacharya & Pampa Sadhukhan & Davide Curcio & Rajeev Dutt & Vipin Kumar Singh & Marco Bianchi & Arnab Pariari & Shubhankar Roy & Prabhat Mandal & Tanmoy Das & Philip Hofman, 2023. "Charge density wave induced nodal lines in LaTe3," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    5. Xiaozhou Zan & Xiangdong Guo & Aolin Deng & Zhiheng Huang & Le Liu & Fanfan Wu & Yalong Yuan & Jiaojiao Zhao & Yalin Peng & Lu Li & Yangkun Zhang & Xiuzhen Li & Jundong Zhu & Jingwei Dong & Dongxia Sh, 2024. "Electron/infrared-phonon coupling in ABC trilayer graphene," Nature Communications, Nature, vol. 15(1), pages 1-6, December.
    6. D. Subires & A. Korshunov & A. H. Said & L. Sánchez & Brenden R. Ortiz & Stephen D. Wilson & A. Bosak & S. Blanco-Canosa, 2023. "Order-disorder charge density wave instability in the kagome metal (Cs,Rb)V3Sb5," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    7. 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.
    8. 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.

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