• Accepted Paper

Theory of a strange metal in a quantum superconductor to metal transition

Jaewon Kim, Erez Berg, and Ehud Altman

Phys. Rev. B - Accepted 3 September, 2026

DOI: https://doi.org/10.1103/wpmm-x5h5

Abstract

Recent experiments with nanopatterned thin films revealed an unusual quantum superconductor to metal phase transition (QSMT) with a linear in temperature resistivity. In contrast, most known examples of such transitions and standard theoretical considerations predict a temperature-independent sheet resistance of order RQ=ℏe2. We propose an effective theory of a disordered superconductor which features a QSMT with robust T linear resistivity at the critical point. The crucial ingredient in our model is spatial disorder in the pairing interaction. Such random pairing mirrors the emergent phase disorder seen in a recent mean field study of a microscopic d-wave superconductor subject to potential disorder. We also make the prediction that in such systems the diamagnetic susceptibility diverges as logΛT, which starkly differs from the power law divergence in standard XY transitions.

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