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Reemergence of high-Tc superconductivity in the (Li1-xFe x )OHFe1-ySe under high pressure

Author

Listed:
  • J. P. Sun

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • P. Shahi

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • H. X. Zhou

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Y. L. Huang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • K. Y. Chen

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • B. S. Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • S. L. Ni

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • N. N. Li

    (Center for High Pressure Science and Technology Advanced Research (HPSTAR))

  • K. Zhang

    (Center for High Pressure Science and Technology Advanced Research (HPSTAR))

  • W. G. Yang

    (Center for High Pressure Science and Technology Advanced Research (HPSTAR)
    Carnegie Institution of Washington)

  • Y. Uwatoko

    (University of Tokyo)

  • G. Xing

    (University of Missouri
    Jilin University)

  • J. Sun

    (University of Missouri)

  • D. J. Singh

    (University of Missouri)

  • K. Jin

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • F. Zhou

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • G. M. Zhang

    (Tsinghua University)

  • X. L. Dong

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Z. X. Zhao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • J.-G. Cheng

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

Abstract

In order to elucidate pressure-induced second superconducting phase (SC-II) in A x Fe2−ySe2 (A = K, Rb, Cs, and Tl) having an intrinsic phase separation, we perform a detailed high-pressure magnetotransport study on the isoelectronic, phase-pure (Li1−xFe x )OHFe1−ySe single crystals. Here we show that its ambient-pressure superconducting phase (SC-I) with a critical temperature Tc ≈ 40 K is suppressed gradually to below 2 K and an SC-II phase emerges above Pc ≈ 5 GPa with Tc increasing progressively to above 50 K up to 12.5 GPa. Our high-precision resistivity data uncover a sharp transition of the normal state from Fermi liquid for SC-I to non-Fermi liquid for SC-II phase. In addition, the reemergence of high-Tc SC-II is found to accompany with a concurrent enhancement of electron carrier density. Without structural transition below 10 GPa, the observed SC-II with enhanced carrier density should be ascribed to an electronic origin presumably associated with pressure-induced Fermi surface reconstruction.

Suggested Citation

  • J. P. Sun & P. Shahi & H. X. Zhou & Y. L. Huang & K. Y. Chen & B. S. Wang & S. L. Ni & N. N. Li & K. Zhang & W. G. Yang & Y. Uwatoko & G. Xing & J. Sun & D. J. Singh & K. Jin & F. Zhou & G. M. Zhang &, 2018. "Reemergence of high-Tc superconductivity in the (Li1-xFe x )OHFe1-ySe under high pressure," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-02843-7
    DOI: 10.1038/s41467-018-02843-7
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    Cited by:

    1. N. N. Wang & M. W. Yang & Z. Yang & K. Y. Chen & H. Zhang & Q. H. Zhang & Z. H. Zhu & Y. Uwatoko & L. Gu & X. L. Dong & J. P. Sun & K. J. Jin & J.-G. Cheng, 2022. "Pressure-induced monotonic enhancement of Tc to over 30 K in superconducting Pr0.82Sr0.18NiO2 thin films," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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