Universal scaling relations in electron-phonon superconductors
arXiv:2407.14580 · doi:10.1103/PhysRevLett.134.216002
Abstract
We study linear scaling relations in electron-phonon superconductors. By combining numerical and analytical techniques, we find linear Homes scaling relations between the zero-temperature superfluid density and the normal-state dc conductivity. This phenomenon arises via either a large impurity scattering rate or inelastic scattering of electrons and Einstein phonons at large electron-phonon coupling. Thus, our Letter shows that Homes scaling is more universal than either cuprate or BCS-like physics and is, instead, a fundamental result in a wide class of superconductors.
Main article: 7 pages, 3 figures. Supplemental material: 32 pages, 14 figures
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