Imaging Josephson vortices on curved junctions
Understanding the nature of vortices in type-II superconductors is crucial for comprehending exotic superconductors and advancing the application of superconducting materials in future electronic devices. This study uses spectroscopic scanning tunneling microscopy to visualize Josephson vortices along crystalline domain boundaries in the superconducting spinel oxide $\mathrm{LiT}{\mathrm{i}}_{2}{\mathrm{O}}_{4}$. Our experimental results reveal that the local curvature of the Josephson junction dictates the positioning of Josephson vortices. Self-consistent solutions of the Bogoliubov--de Gennes and gap equations theoretically corroborate this observation. In addition to enhancing our understanding of the physics of Josephson vortex formation, this study offers potential guidelines for developing vortex-based superconducting applications.
Authors
- Chia-Hsiu Hsu (ORCID: https://orcid.org/0000-0001-9130-2626)
- Yuita Fujisawa (ORCID: https://orcid.org/0000-0002-5436-0883)
- T. Machida (ORCID: https://orcid.org/0000-0001-7389-8315)
- Yuki Nagai (ORCID: https://orcid.org/0000-0001-5098-5440)
- Anjana Krishnadas (ORCID: https://orcid.org/0000-0002-5860-6705)
- Guoqing Chang (ORCID: https://orcid.org/0000-0003-1180-3127)
- B. R. M. Smith (ORCID: https://orcid.org/0000-0002-5442-3901)
- Markel Pardo‐Almanza (ORCID: https://orcid.org/0000-0002-0119-5407)
- Tomonori Nakamura (ORCID: https://orcid.org/0000-0002-7702-8760)
- Yoshinori Okada (ORCID: https://orcid.org/0000-0001-9172-0844)
- Hoshu Hiyane (ORCID: https://orcid.org/0009-0008-2584-6623)
Institutions
- Japan Atomic Energy Agency (JP)
- Okinawa Institute of Science and Technology Graduate University (JP)
- Nanyang Technological University (SG)
- RIKEN (JP)
- RIKEN Center for Emergent Matter Science (JP)
- Ion Technology Center (Japan) (JP)
- The University of Tokyo (JP)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2024-12-13
- DOI
- https://doi.org/10.1103/physrevb.110.224511
- Citations
- 2
- Primary Topic
- Physics of Superconductivity and Magnetism
- Type
- article
- Field-Weighted Citation Impact
- 0.62