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首页> 外文期刊>Philosophical transactions of the Royal Society. Mathematical, physical, and engineering sciences >Superconductivity in room-temperature stable electride and high-pressure phases of alkali metals
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Superconductivity in room-temperature stable electride and high-pressure phases of alkali metals

机译:室温稳定电和碱金属高压相中的超导

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摘要

S-band metals such as alkali and alkaline earth metals do not undergo a superconducting transition (SCT) at ambient pressure, but their high-pressure phases do. By contrast, room-temperature stable electride [Ca24Al28O64](4+)center dot 4e(-) (C12A7:e(-)) in which anionic electrons in the crystallographic sub-nanometer-size cages have high s-character exhibits SCT at 0.2-0.4K at ambient pressure. In this paper, we report that crystal and electronic structures of C12A7:e(-) are close to those of the high-pressure superconducting phase of alkali and alkaline earth metals and the SCT of both materials is induced when electron nature at Fermi energy (E-F) switches from s-to sd-hybridized state.
机译:S波段金属(例如碱金属和碱土金属)在环境压力下不会经历超导转变(SCT),但它们的高压相却会发生。相比之下,室温稳定的[Ca24Al28O64](4+)中心点4e(-)(C12A7:e(-))中心点,其中晶体学亚纳米级笼中的阴离子电子具有较高的s-字符,其SCT为在环境压力下为0.2-0.4K。在本文中,我们报道了C12A7:e(-)的晶体和电子结构接近碱金属和碱土金属的高压超导相的晶体和电子结构,当费米能( EF)从s切换到sd混合状态。

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