arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1507.02522cond-mat.supr-con
收藏

成键对高压超导体超导电性的影响

Influence of bonding on superconductivity in high-pressure hydrides

Christoph Heil, Lilia Boeri

摘要:

最近关于硫化氢在200 GPa压力下190 K以上高温超导性的报道,超过了以前发现的所有超导体,极大地激发了人们对致密富氢固体的兴趣。在本文中,我们研究了一种可能的方法来优化这些化合物的临界温度使用第一性原理线性响应计算。我们建构假设的炼金术原子,以顺利地插入硫族元素之间,并研究它们的成键和超导性质。我们的研究结果表明,已经显着的H $_3$ S的临界温度可以进一步提高,通过增加相关键的离子特性,即用更多的电负性元素部分取代硫。

英文摘要:

The recent reports on high-temperature superconductivity above 190 K in hydrogen sulfide at 200 GPa pressure, exceeding all previously discovered superconductors, has greatly invigorated the interest in dense hydrogen-rich solids. In this paper, we investigate a possible way to optimize the critical temperature in these compounds using first-principles linear-response calculations. We construct hypothetical alchemical atoms to smoothly interpolate between elements of the chalcogen group and study their bonding and superconducting properties. Our results show that the already remarkable critical temperatures of H$_3$S could be improved even further by increasing the ionic character of the relevant bonds, i.e. replacing sulfur partially with more electronegative elements.

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。

↑