Imaging Josephson vortices on curved junctions
Yuita Fujisawa, Anjana Krishnadas, Tomonori Nakamura, Chia-Hsiu Hsu, Barnaby Smith, Markel Pardo-Almanza, Hoshu Hiyane, Guoqing Chang, Yuki Nagai, Tadashi Machida, Yoshinori Okada
DOI 10.1103/PhysRevB.110.224511 · Physical Review B
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Abstract
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 LiTi2O4. 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LiTi2O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
| LiTi2O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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