Nb-substitution suppresses the superconducting critical temperature of pressurized MoB_2

A recent work has demonstrated that MoB_2, transforming to the same structure as MgB_2 (P6/mmm), superconducts at temperatures above 30 K near 100 GPa [C. Pei et al. Natl. Sci. Rev., nwad034 (2023)], and Nb-substitution in MoB_2 stabilizes the P6/mmm structure down to ambient pressure [A. C. Hire et al.... Show more