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.

翻译：最近关于硫化氢中高温超导度超过190K的200千兆帕压力超过所有先前发现的超导体的报告极大地激发了对含氢富集固体的兴趣。在本文件中,我们研究了一种可能的方法,利用第一原则线性反应计算优化这些化合物的临界温度。我们建造了假设的藻类原子,以顺利地在化学分子组各元素间进行插,并研究它们的结合和超导特性。我们的结果显示,通过提高相关债券的离子特性,即用更多的电反元素来部分取代硫,本已相当惊人的H$_3$S的临界温度可以进一步改善。