Disorder-induced pronounced magnetoresistive hysteresis in Josephson junctions
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 ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$. 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 ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ 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.
Authors
- Anita Guarino (ORCID: https://orcid.org/0000-0001-8191-854X)
- Mario Cuoco (ORCID: https://orcid.org/0000-0002-7325-8331)
- Yuriy Yerin (ORCID: https://orcid.org/0000-0002-6026-5700)
- Chao Ma (ORCID: https://orcid.org/0000-0001-8599-9340)
- Yu Wu (ORCID: https://orcid.org/0000-0002-5570-270X)
- Weichao Yu (ORCID: https://orcid.org/0000-0001-6675-5535)
- Daiqiang Huang
- Chang Niu (ORCID: https://orcid.org/0000-0001-8577-0749)
- Wenjie Hu (ORCID: https://orcid.org/0000-0001-9768-4952)
- A. Vecchione (ORCID: https://orcid.org/0000-0001-6848-6084)
- Yang Liu (ORCID: https://orcid.org/0000-0002-6329-8647)
- Jian Shen (ORCID: https://orcid.org/0000-0001-5670-1429)
- R. Fittipaldi (ORCID: https://orcid.org/0000-0003-2096-7983)
- Huanyu Zhang (ORCID: https://orcid.org/0000-0001-7337-0748)
- Hangwen Guo (ORCID: https://orcid.org/0009-0000-3266-7828)
- Zhen Wang (ORCID: https://orcid.org/0000-0003-3613-3238)
Institutions
- University of Science and Technology of China (CN)
- University of Salerno (IT)
- Hunan University (CN)
- Peking University (CN)
- Fudan University (CN)
- Hefei University (CN)
- Superconducting and other Innovative Materials and Devices Institute (IT)
- Collaborative Innovation Center of Advanced Microstructures (CN)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-04-17
- DOI
- https://doi.org/10.1103/physrevb.111.134513
- Citations
- 1
- Primary Topic
- Magnetic and transport properties of perovskites and related materials
- Type
- article
- Field-Weighted Citation Impact
- 0.43
Funders
- Natural Science Foundation of Shanghai
- National Natural Science Foundation of China
- Science and Technology Commission of Shanghai Municipality
- Ministero dell'Università e della Ricerca
- National Key Research and Development Program of China