Abstract
This study investigates the gap-to-Tc ratio (R) of yttrium hydride superconductors within the weak coupling limit. We derived an analytical formula for the gap-to-Tc ratio. The ratio of the gap-to-Tc is dependent on the pressure applied to each superconductor. The maximum ratio, approximately 3.85, is observed in one superconductor, while the lowest ratio, roughly 3.21, is found in another superconductor. Based on the findings of our study, it can be deduced that yttrium hydride superconductors exhibit attributes commonly associated with weak-coupling superconductors. The influence of the Coulomb potential is more pronounced at a critical temperature compared to the ratio of the gap to the critical temperature.
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