Disorder-induced pronounced magnetoresistive hysteresis in Josephson junctions
Yu Wu, Daiqiang Huang, Huanyu Zhang, Anita Guarino, Rosalba Fittipaldi, Chao Ma, Wenjie Hu, Chang Niu, Zhen Wang, Weichao Yu, Yuriy Yerin, Antonio Vecchione, Yang Liu, Mario Cuoco, Hangwen Guo, Jian Shen
DOI 10.1103/PhysRevB.111.134513 · Physical Review B
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Abstract
The relation between superconductivity and time-reversal symmetry is one of the most fascinating problems in condensed-matter physics. Here we report an anomalous transport behavior in superconducting Josephson junctions induced by surface disorder. We fabricate vertical Josephson junctions using metallic superconductor (Al) and ion-bombarded Sr2RuO4. Below the superconducting transition temperature, we observe persistent magnetoresistive hysteresis behavior dependent on the disorder deposition time. Field- and temperature-dependent measurements suggest that the observed effects arise from disorder-induced anomalous flux in Sr2RuO4 which can be sensitively detected by superconducting Al. To account for the observed findings, we consider different physical scenarios such as interband surface pairing reconstruction, magnetic surface states, and vortex phases.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.4 | Pressure not reported | onset |
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.19 | Pressure not reported | onset |
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