第一性原理预测揭示YSc$_2$H$_{24}$笼状结构中的高温超导性
First Principles Prediction Unveils High-T$_c$ Superconductivity in YSc$_2$H$_{24}$ Cage Structures
AI总结：
本研究通过晶体结构预测方法发现高压下稳定的新型氢化物YSc$_2$H$_{24}$，其笼状结构展现出极强的电声子耦合，在310 GPa下临界温度达302-330 K，为高温超导体的理解与应用提供了新方向。
摘要：
室温超导性的探索一直是材料科学领域的长期愿景，推动了广泛的研究努力。在本研究中，我们提出了一种新型氢化物YSc$_2$H$_{24}$，该材料在高压下稳定，是通过晶体结构预测方法发现的。所发现的材料结晶为六方晶胞，空间群为$P6/mmm$，具有由两种不同笼子组成的迷人结构：Sc@H$_{24}$和Y@H$_{30}$。通过对晶格动力学、电声子耦合进行广泛的数值研究，并求解各向同性Eliashberg方程，我们揭示了$λ$ = 3.27这一显著值是导致YSc$_2$H$_{24}$在310 GPa压力下具有302-330 K极高临界温度（T$_c$）的内在因素。随着压力增加，T$_c$保持在室温以上。我们的工作有潜力增进对高温超导体的现有理解，对实际应用具有重要意义。这些笼状结构的独特网络为推进我们对高温超导体的理解带来了巨大希望，并可能引领创新应用。
英文摘要：
The quest for room-temperature superconductivity has been a long-standing aspiration in the field of materials science, driving extensive research efforts. In this work, we present a novel hydride, YSc$_2$H$_{24}$, which is stable at high pressure, identified through crystal structure prediction methods. The discovered material is crystalline in a hexagonal unit cell with space group $P6/mmm$ and has a fastinating structure consisting of two distinct cages: Sc@H$_{24}$ and Y@H$_{30}$. By conducting an extensive numerical investigation of lattice dynamics, electron-phonon coupling, and solving the isotropic Eliashberg equation, we have revealed a significant value of $λ$ = 3.27 as the underlying factor responsible for the remarkably high critical temperature (T$_c$) of 302-330 K in YSc$_2$H$_{24}$ at a pressure of 310 GPa. As pressure increases, the T$_c$ remains above the ambient temperature. Our work has the potential to enhance the existing understanding of high-temperature superconductors, with implications for practical applications. The unique network of these cage-like structures holds great promise for advancing our understanding of high-temperature superconductors, potentially leading to innovative applications.
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