Author:
Li Bin,Yang Yeqian,Fan Yuxiang,Zhu Cong,Liu Shengli,Shi Zhixiang
Abstract
High-pressure structural search was performed on the hydrogen-rich compound LuBeH8 at pressures up to 200 GPa. We found an
F
m
3
¯
m
structure that exhibits stability and superconductivity above 100 GPa. Our phonon dispersion, electronic band structure, and superconductivity analyses in the 100–200 GPa pressure range reveal a strong electron–phonon coupling in LuBeH8, while the superconducting critical temperature T
c shows a decreasing trend as the pressure increases, with T
c = 255 K at 200 GPa and maximal T
c = 355 K at 100 GPa. This study demonstrated the room-temperature superconductivity in
F
m
3
¯
m
-LuBeH8, thus enriching the family of ternary hydrides. These findings provide valuable guidance for identifying new high-temperature superconducting hydrides.
Subject
General Physics and Astronomy