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arXiv · 2407.14580

Universal scaling relations in electron-phonon superconductors

Joshuah T. Heath·Rufus Boyack
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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.

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Joshuah T. Heath, Rufus Boyack. 2024-07-19. Universal scaling relations in electron-phonon superconductors. https://doi.org/10.1103/physrevlett.134.216002

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