High-temperature superconductivity in atomic metallic hydrogen

Schrie er (BCS) theory6, three key arguments support this prediction: (i) the ions in the system are single protons, and their small masses cause the vibrational energy scale of the phonons to be remarkably high (e.g., k Bh!iˇ2300K near 500 GPa, where k B is Boltzmann’s constant and h!iis the average phonon frequency { see below), as is thus

https://link.aps.org/accepted/10.1103/PhysRevB.84.144515