Clathrate metal superhydrides under high-pressure conditions:enroute to room-temperature superconductivity

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外文摘要：Room-temperature superconductivity has been a long-held dream of mankind and a focus of considerable interest in the research field of superconductivity.Significant progress has recently been achieved in hydrogen-based superconductors found in superhydrides(hydrides with unexpectedly high hydrogen contents)that are stabilized under high-pressure conditions and are not capturable at ambient conditions.Of particular interest is the discovery of a class of best-ever-known superconductors in clathrate metal superhydrides that hold the record for high superconductivity(e.g.Tc=250-260 K for LaH10)among known superconductors and have great promise to be those that realize the long-sought room-temperature superconductivity.In these peculiar clathrate superhydrides,hydrogen forms unusual'clathrate'cages containing encaged metal atoms,of which such a kind was first reported in a calcium hexa-superhydride(CaH6)showing a measured high Tc of 215 K under a pressure of 170 GPa.In this review,we aim to offer an overview of the current status of research progress on the clathrate metal superhydride superconductors,discuss the superconducting mechanism and highlight the key features(e.g.structure motifs,bonding features,electronic structure,etc.)that govern the high-temperature superconductivity.Future research direction along this line to find room-temperature superconductors will be discussed.

外文关键词：

clathrate superhydrideshigh-temperature superconductivityhigh-pressure conditionscrystal structure prediction

作者：

Ying Sun、Xin Zhong、Hanyu Liu、Yanming Ma

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作者单位：

Key Laboratory of Material Simulation Methods & Software of Ministry of Education,College of Physics,Jilin University,Changchun 130012,China

State Key Laboratory of Superhard Materials,College of Physics,Jilin University,Changchun 130012,China

International Center of Future Science,Jilin University,Changchun 130012,China

基金：

Major Program of the National Natural Science Foundation of ChinaStrategic Priority Research Program of Chinese Academy of SciencesNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

项目编号：

52090024XDB3300000012074138522881021237400912034009

出版年：

2024

DOI：

10.1093/nsr/nwad270

国家科学评论(英文版)

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ISSN：

年,卷(期)：2024.11(7)