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Synthesis of clathrate cerium superhydride CeH9 at 80-100 GPa with atomic hydrogen sublattice

Author

Listed:
  • Nilesh P. Salke

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

  • M. Mahdi Davari Esfahani

    (State University of New York, Stony Brook)

  • Youjun Zhang

    (Sichuan University)

  • Ivan A. Kruglov

    (Moscow Institute of Physics and Technology
    Dukhov Research Institute of Automatics (VNIIA))

  • Jianshi Zhou

    (The University of Texas at Austin)

  • Yaguo Wang

    (The University of Texas at Austin)

  • Eran Greenberg

    (University of Chicago)

  • Vitali B. Prakapenka

    (University of Chicago)

  • Jin Liu

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

  • Artem R. Oganov

    (Moscow Institute of Physics and Technology
    Skolkovo Innovation Center
    Northwestern Polytechnical University)

  • Jung-Fu Lin

    (The University of Texas at Austin)

Abstract

Hydrogen-rich superhydrides are believed to be very promising high-Tc superconductors. Recent experiments discovered superhydrides at very high pressures, e.g. FeH5 at 130 GPa and LaH10 at 170 GPa. With the motivation of discovering new hydrogen-rich high-Tc superconductors at lowest possible pressure, here we report the prediction and experimental synthesis of cerium superhydride CeH9 at 80–100 GPa in the laser-heated diamond anvil cell coupled with synchrotron X-ray diffraction. Ab initio calculations were carried out to evaluate the detailed chemistry of the Ce-H system and to understand the structure, stability and superconductivity of CeH9. CeH9 crystallizes in a P63/mmc clathrate structure with a very dense 3-dimensional atomic hydrogen sublattice at 100 GPa. These findings shed a significant light on the search for superhydrides in close similarity with atomic hydrogen within a feasible pressure range. Discovery of superhydride CeH9 provides a practical platform to further investigate and understand conventional superconductivity in hydrogen rich superhydrides.

Suggested Citation

  • Nilesh P. Salke & M. Mahdi Davari Esfahani & Youjun Zhang & Ivan A. Kruglov & Jianshi Zhou & Yaguo Wang & Eran Greenberg & Vitali B. Prakapenka & Jin Liu & Artem R. Oganov & Jung-Fu Lin, 2019. "Synthesis of clathrate cerium superhydride CeH9 at 80-100 GPa with atomic hydrogen sublattice," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12326-y
    DOI: 10.1038/s41467-019-12326-y
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    Cited by:

    1. Jingkai Bi & Yuki Nakamoto & Peiyu Zhang & Katsuya Shimizu & Bo Zou & Hanyu Liu & Mi Zhou & Guangtao Liu & Hongbo Wang & Yanming Ma, 2022. "Giant enhancement of superconducting critical temperature in substitutional alloy (La,Ce)H9," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    2. Liu-Cheng Chen & Tao Luo & Zi-Yu Cao & Philip Dalladay-Simpson & Ge Huang & Di Peng & Li-Li Zhang & Federico Aiace Gorelli & Guo-Hua Zhong & Hai-Qing Lin & Xiao-Jia Chen, 2024. "Synthesis and superconductivity in yttrium-cerium hydrides at high pressures," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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