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Unusual competition of superconductivity and charge-density-wave state in a compressed topological kagome metal

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  • F. H. Yu

    (Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China)

  • D. H. Ma

    (Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China)

  • W. Z. Zhuo

    (Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China)

  • S. Q. Liu

    (Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China)

  • X. K. Wen

    (Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China)

  • B. Lei

    (Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China)

  • J. J. Ying

    (Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China)

  • X. H. Chen

    (Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China
    CAS Center for Excellence in Quantum Information and Quantum Physics
    Collaborative Innovation Center of Advanced Microstructures)

Abstract

Understanding the competition between superconductivity and other ordered states (such as antiferromagnetic or charge-density-wave (CDW) state) is a central issue in condensed matter physics. The recently discovered layered kagome metal AV3Sb5 (A = K, Rb, and Cs) provides us a new playground to study the interplay of superconductivity and CDW state by involving nontrivial topology of band structures. Here, we conduct high-pressure electrical transport and magnetic susceptibility measurements to study CsV3Sb5 with the highest Tc of 2.7 K in AV3Sb5 family. While the CDW transition is monotonically suppressed by pressure, superconductivity is enhanced with increasing pressure up to P1 ≈ 0.7 GPa, then an unexpected suppression on superconductivity happens until pressure around 1.1 GPa, after that, Tc is enhanced with increasing pressure again. The CDW is completely suppressed at a critical pressure P2 ≈ 2 GPa together with a maximum Tc of about 8 K. In contrast to a common dome-like behavior, the pressure-dependent Tc shows an unexpected double-peak behavior. The unusual suppression of Tc at P1 is concomitant with the rapidly damping of quantum oscillations, sudden enhancement of the residual resistivity and rapid decrease of magnetoresistance. Our discoveries indicate an unusual competition between superconductivity and CDW state in pressurized kagome lattice.

Suggested Citation

  • 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.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23928-w
    DOI: 10.1038/s41467-021-23928-w
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    Cited by:

    1. M. Roppongi & K. Ishihara & Y. Tanaka & K. Ogawa & K. Okada & S. Liu & K. Mukasa & Y. Mizukami & Y. Uwatoko & R. Grasset & M. Konczykowski & B. R. Ortiz & S. D. Wilson & K. Hashimoto & T. Shibauchi, 2023. "Bulk evidence of anisotropic s-wave pairing with no sign change in the kagome superconductor CsV3Sb5," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Camron Farhang & Jingyuan Wang & Brenden R. Ortiz & Stephen D. Wilson & Jing Xia, 2023. "Unconventional specular optical rotation in the charge ordered state of Kagome metal CsV3Sb5," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    3. Rina Tazai & Youichi Yamakawa & Hiroshi Kontani, 2023. "Charge-loop current order and Z3 nematicity mediated by bond order fluctuations in kagome metals," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    4. 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.
    5. Changwon Park & Young-Woo Son, 2023. "Condensation of preformed charge density waves in kagome metals," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    6. 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.
    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. Yeahan Sur & Kwang-Tak Kim & Sukho Kim & Kee Hoon Kim, 2023. "Optimized superconductivity in the vicinity of a nematic quantum critical point in the kagome superconductor Cs(V1-xTix)3Sb5," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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