High‐Throughput Study of Ambient‐Pressure High‐Temperature Superconductivity in Ductile Few‐Hydrogen Metal‐Bonded Perovskites

Several multi‐hydrogen hydrides have exhibited high critical temperature ( T c ) superconductivity, but the requirement for ultrahigh pressures limits their applications. Here, high‐throughput calculations are utilized to investigate the superconductivity in few‐hydrogen metal‐bonded (FHMB) perovskites (PVSKs) AHM 3 characterized with perfect ambient‐pressure stability. AHM 3 is classified into two groups, d and sp superconductors, and provide three indicators that accurately describe AHM 3 superconductivity. i) T c of d superconductors is positively correlated with the number of unpaired d electrons from M atoms; ii) A suitably sized octahedral interstice of H atom is essential for sp superconductors; iii) The introduction of H will further improve the superconductivity, when the M atom has a lower electronegativity than H. ZnHCr 3 and ZnHAl 3 , perfectly meeting the requirements aforementioned, exhibit the highest T c of 30 and 80 K among the d and sp superconductors, respectively. The results are helpful for understanding the electron–phonon coupling (EPC) mechanism in few‐hydrogen metal‐bonded perovskites and facilitate realizations of ambient‐pressure high‐ T c superconductivity in hydrides.