中等压力下 Yb/Lu 取代的笼形六氢化物的室温超导性。,Research

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中等压力下 Yb/Lu 取代的笼形六氢化物的室温超导性。
Research ( IF 8.5 ) Pub Date : 2022-08-05 , DOI: 10.34133/2022/9784309
Mingyang Du ₁ , Hao Song ₁ , Zihan Zhang ₁ , Defang Duan ₁ , Tian Cui _{1,

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Affiliation

室温超导是人类一个世纪以来一直追逐的梦想。近年来，在高压下合成H3S、LaH10和CSH化合物，逐渐使这一梦想成为现实。但是稳定氢基超导体所需的极高压力限制了它们的应用。因此，下一个挑战是在极低的压力甚至环境压力下实现室温超导性。在这项工作中，我们设计了一系列高温超导体，通过将重稀土元素 Yb/Lu 掺入类方钠石笼形六氢化物中，可以在中等压力下保持稳定。特别是，Y3LuH24、YLuH12 和 YLu3H24 的临界温度 (T c) 在 120 GPa 时可分别达到 283 K、在 140 GPa 时可达到 275 K 和在 110 GPa 时可达到 288 K。它们的临界温度接近或已达到室温，最小稳定压力明显低于已报道的室温超导体。我们的工作为合理设计同时具有室温超导性的低压稳定氢基超导体提供了一种有效的方法，并将激发进一步的实验探索。

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Room-Temperature Superconductivity in Yb/Lu Substituted Clathrate Hexahydrides under Moderate Pressure.

Room temperature superconductivity is a dream that mankind has been chasing for a century. In recent years, the synthesis of H3S, LaH10, and C-S-H compounds under high pressures has gradually made that dream become a reality. But the extreme high pressure required for stabilization of hydrogen-based superconductors limit their applications. So, the next challenge is to achieve room-temperature superconductivity at significantly low pressures, even ambient pressure. In this work, we design a series of high temperature superconductors that can be stable at moderate pressures by incorporating heavy rare earth elements Yb/Lu into sodalite-like clathrate hexahydrides. In particular, the critical temperatures (T c) of Y3LuH24, YLuH12, and YLu3H24 can reach 283 K at 120 GPa, 275 K at 140 GPa, and 288 K at 110 GPa, respectively. Their critical temperatures are close to or have reached room temperature, and minimum stable pressures are significantly lower than that of reported room temperature superconductors. Our work provides an effective method for the rational design of low-pressure stabilized hydrogen-based superconductors with room-temperature superconductivity simultaneously and will stimulate further experimental exploration.

更新日期：2022-08-05

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