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arXiv 2407.03556cond-mat.supr-con
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10 GPa以下钙钛矿氢化物的高温超导性

High-temperature Superconductivity in Perovskite Hydride below 10 GPa

Mingyang Du, Hongyu Huang, Zihan Zhang, Min Wang, Hao Song, Defang Duan, Tian Cui

AI总结:

本文通过研究182个三元体系,设计出可在10 GPa内稳定的高温钙钛矿氢化物,其中5种超导转变温度超过120 K,为低压高温超导体的实验探索提供了新方向。

摘要:

氢和氢化物材料长期以来被认为是实现高温超导的有前景材料。但氢基超导体金属化所需的极端压力限制了它们的应用。在此,我们设计了一系列可在10 GPa内保持稳定的高温钙钛矿氢化物。我们的研究覆盖了182个三元体系,最终确定9种化合物在20 GPa内稳定,其中5种在10 GPa内表现出超过120 K的超导转变温度。令人振奋的是,KGaH3和CsInH3在50 GPa下热力学稳定。在这些钙钛矿氢化物中,碱金属负责提供固定量的电荷并维持结构稳定性,而由IIIA族元素和氢形成的立方框架对高温超导性至关重要。这项工作将激发进一步的实验探索,并在探索低压稳定高温超导体方面迈出重要一步。

英文摘要:

Hydrogen and hydrides materials have long been considered promising materials for high-temperature superconductivity. But the extreme pressures required for the metallization of hydrogen-based superconductors limit their applications. Here, we have designed a series of high-temperature perovskite hydrides that can be stable within 10 GPa. Our research covered 182 ternary systems and ultimately determined that 9 compounds were stable within 20 GPa, of which 5 exhibited superconducting transition temperatures exceeding 120 K within 10 GPa. Excitingly, KGaH3 and CsInH3 are thermodynamically stable at 50 GPa. Among these perovskite hydrides, alkali metals are responsible for providing a fixed amount of charge and maintaining structural stability, while the cubic framework formed by IIIA group elements and hydrogen is crucial for high-temperature superconductivity. This work will inspire further experimental exploration and take an important step in the exploration of low-pressure stable high-temperature superconductors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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