High-Temperature Superconductivity of Thermodynamically Stable Fluorite-Type Hydrides at Ambient Pressure.

ABSTRACT: Hydride superconductors have attracted significant attention, yet achieving superconductivity at ambient pressure remains a key challenge. Here, a family of high-T_c (superconducting critical temperature, T_c) hydrides based on the fluorite-type AXH₈ structure, exhibiting thermodynamic and dynamic stability at low to atmospheric pressure, is proposed. Through comprehensive screening of 150 ternary systems, eight stable hydrides below 35 GPa are identified. Notably, AcRhH₈ and BaRhH₈ show ambient-pressure stability, while AcIrH₈ and BaIrH₈ are stable at 3 GPa, demonstrating great potential for practical applications. Several compounds surpass the liquid-nitrogen T_c threshold, including AcRhH₈ (7

SUBMITTER: Huang H 

PROVIDER: S-EPMC12667446 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature