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Enhancement of superconducting properties in the La–Ce–H system at moderate pressures

Author

Listed:
  • Wuhao Chen

    (Jilin University)

  • Xiaoli Huang

    (Jilin University)

  • Dmitrii V. Semenok

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

  • Su Chen

    (Jilin University)

  • Di Zhou

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

  • Kexin Zhang

    (Jilin University)

  • Artem R. Oganov

    (Skolkovo Innovation Center)

  • Tian Cui

    (Jilin University
    Ningbo University)

Abstract

Ternary hydrides are regarded as an important platform for exploring high-temperature superconductivity at relatively low pressures. Here, we successfully synthesized the hcp-(La,Ce)H9-10 at 113 GPa with the initial La/Ce ratio close to 3:1. The high-temperature superconductivity was strikingly observed at 176 K and 100 GPa with the extrapolated upper critical field Hc2(0) reaching 235 T. We also studied the binary La-H system for comparison, which exhibited a Tc of 103 K at 78 GPa. The Tc and Hc2(0) of the La-Ce-H are respectively enhanced by over 80 K and 100 T with respect to the binary La-H and Ce-H components. The experimental results and theoretical calculations indicate that the formation of the solid solution contributes not only to enhanced stability but also to superior superconducting properties. These results show how better superconductors can be engineered in the new hydrides by large addition of alloy-forming elements.

Suggested Citation

  • Wuhao Chen & Xiaoli Huang & Dmitrii V. Semenok & Su Chen & Di Zhou & Kexin Zhang & Artem R. Oganov & Tian Cui, 2023. "Enhancement of superconducting properties in the La–Ce–H system at moderate pressures," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38254-6
    DOI: 10.1038/s41467-023-38254-6
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