Predicted Novel Superconductivity in Compressed Hydrides*

The mechanisms for the strong electron-phonon coupling predicted for hydrogen-rich alloys with high superconductivity critical temperature were examined within the Bardeen-Schrieffer-Cooper and Midgal-Eliashberg theory. In this work, we have explored some candidate structures for hydrides at high pressures. Electron-phonon coupling calculations predict the existence of new superconducting phases, some exhibiting superconductivity in the range of room temperature. Further analysis shows that the hydrogen-hydrogen bonding played an important role in determining electron-phonon coupling parameters. Moreover, the calculated stabilities indicate the materials could be synthesized at pressures that are currently accessible in the laboratory. The results open the prospect for the design, synthesis, and recovery of new high-temperature superconductors with potential practical applications.