Calculating the Transition Temperature of Metal–Hydrogen Systems Using the Roeser–Huber Formalism

The superconducting transition temperature, Tc, is calculated for metal–hydrogen systems using the Roeser–Huber formalism. In this approach, a non-trivial connection between the respective crystal lattice and the superconductivity is established. As an example, we show the calculations for metallic Pd and saturated with hydrogen (Pd–H). The uptake of hydrogen changes the crystal lattice with several consequences for superconductivity, and the amount of atoms having an influence on the superconducting path via electron-phonon interaction. Furthermore, we can show that in the La–H system, an increasing amount of H atoms changes the material character from conventional superconductor to a high-Tc superconductor-like behavior.