A first-principles study of theoretical superconductivity on RbH by doping without applied pressure

The structural, electronic, lattice dynamics, electron-phonon (el-ph) coupling, and superconducting (SC) properties of the alkali-metal hydride RbH, metallized through electron-doping by the construction of the solid-solution Rb 1-x x H, are systematically analyzed as a function of Sr-content within the framework of density functional perturbation and Migdal-Eliashberg theories, taking into account the effect of zero-point energy contribution by the quasi-harmonic approximation. For the entire studied range of Sr-content, steady increments of the el-ph coupling constant and the SC critical temperature are found with progressive alkaline-earth metal content through electron-doping, reaching the values of lambda = 1.92 and Tc=51.3(66.1) mu*

Automated summary

By electron-doping and constructing solid-solution, the physical properties of alkali-metal hydride can be modified, resulting in metallization and superconductivity.