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Pressured-induced superconducting phase with large upper critical field and concomitant enhancement of antiferromagnetic transition in EuTe2

Author

Listed:
  • P. T. Yang

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

  • Z. Y. Liu

    (Chinese Academy of Sciences)

  • K. Y. Chen

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

  • X. L. Liu

    (Shanghai Tech University)

  • X. Zhang

    (Shanghai Tech University)

  • Z. H. Yu

    (Shanghai Tech University)

  • H. Zhang

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

  • J. P. Sun

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory, Dongguan)

  • Y. Uwatoko

    (University of Tokyo, Kashiwa)

  • X. L. Dong

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory, Dongguan)

  • K. Jiang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory, Dongguan)

  • J. P. Hu

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

  • Y. F. Guo

    (Shanghai Tech University)

  • B. S. Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory, Dongguan)

  • J.-G. Cheng

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

Abstract

We report an unusual pressure-induced superconducting state that coexists with an antiferromagnetic ordering of Eu2+ moments and shows a large upper critical field comparable to the Pauli paramagnetic limit in EuTe2. In concomitant with the emergence of superconductivity with Tc ≈ 3–5 K above Pc ≈ 6 GPa, the antiferromagnetic transition temperature TN(P) experiences a quicker rise with the slope increased dramatically from dTN/dP = 0.85(14) K/GPa for P ≤ Pc to 3.7(2) K/GPa for P ≥ Pc. Moreover, the superconducting state can survive in the spin-flop state with a net ferromagnetic component of the Eu2+ sublattice under moderate magnetic fields μ0H ≥ 2 T. Our findings establish the pressurized EuTe2 as a rare magnetic superconductor possessing an intimated interplay between magnetism and superconductivity.

Suggested Citation

  • P. T. Yang & Z. Y. Liu & K. Y. Chen & X. L. Liu & X. Zhang & Z. H. Yu & H. Zhang & J. P. Sun & Y. Uwatoko & X. L. Dong & K. Jiang & J. P. Hu & Y. F. Guo & B. S. Wang & J.-G. Cheng, 2022. "Pressured-induced superconducting phase with large upper critical field and concomitant enhancement of antiferromagnetic transition in EuTe2," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30718-5
    DOI: 10.1038/s41467-022-30718-5
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