Theory of a Strange Metal in a Quantum Superconductor to Metal Transition
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913300529283072 |
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| author | Kim, Jaewon Berg, Erez Altman, Ehud |
| author_facet | Kim, Jaewon Berg, Erez Altman, Ehud |
| contents | 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 $R_Q = \frac{\hbar}{e^2}$. 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 $\log\fracΛ{T}$, which starkly differs from the power law divergence in standard XY transitions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_17353 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Theory of a Strange Metal in a Quantum Superconductor to Metal Transition Kim, Jaewon Berg, Erez Altman, Ehud Strongly Correlated Electrons 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 $R_Q = \frac{\hbar}{e^2}$. 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 $\log\fracΛ{T}$, which starkly differs from the power law divergence in standard XY transitions. |
| title | Theory of a Strange Metal in a Quantum Superconductor to Metal Transition |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2401.17353 |