Superfluid Density in Conventional Superconductors: From Clean to Strongly Disordered.

We reexpress the superfluid density of a disordered superconductor obtained by two of us earlier [Phys. Rev. B 102, 024514 (2020)] in a new highly convergent form, and use the results to make an extensive and successful comparison with experiment in the dirty limit for all temperatures. We point out that there is a regime (conventional superconductor with low, but increasing disorder) where theoretical predictions need to be confronted with accurate experiment.