Synthesis of clathrate cerium superhydride CeH9 at 80-100 GPa with atomic hydrogen sublattice
Synthesis of clathrate cerium superhydride CeH9 at 80-100 GPa with atomic hydrogen sublattice
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DOI：
10.1038/s41467-019-12326-y
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发表时间：
2019
影响因子：
16.6
通讯作者：
Jung-Fu Lin
中科院分区：
文献类型：
--
作者：
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
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.
