Planar Josephson junctions for sensors and electronics:Different geometry, new functionality
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866916008004943872 |
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| author | Krasnov, Vladimir M. |
| author_facet | Krasnov, Vladimir M. |
| contents | Josephson junctions are key elements in superconducting electronics. The most common type is the overlap (sandwich-type) junction, formed by vertically stacking two superconducting layers. In contrast, planar junctions are fabricated without overlap, at the edge of two superconducting films within a single plane. This geometric distinction has a significant impact on their physical properties. The planar geometry greatly enhances sensitivity to magnetic fields and improves impedance matching for terahertz (THz) devices. Its two-dimensional structure allows for simple and flexible electronic component design, enabling drastic miniaturization. Here I highlight recent advances in the application of planar junctions for novel technologies, including junction-on-cantilever sensors for super-resolution magnetic imaging, vortex-based memory cells, and programmable superconducting diodes. I will also discuss the general requirements, future perspectives, and key challenges in the evolving field of superconducting electronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_20424 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Planar Josephson junctions for sensors and electronics:Different geometry, new functionality Krasnov, Vladimir M. Superconductivity Applied Physics Instrumentation and Detectors Josephson junctions are key elements in superconducting electronics. The most common type is the overlap (sandwich-type) junction, formed by vertically stacking two superconducting layers. In contrast, planar junctions are fabricated without overlap, at the edge of two superconducting films within a single plane. This geometric distinction has a significant impact on their physical properties. The planar geometry greatly enhances sensitivity to magnetic fields and improves impedance matching for terahertz (THz) devices. Its two-dimensional structure allows for simple and flexible electronic component design, enabling drastic miniaturization. Here I highlight recent advances in the application of planar junctions for novel technologies, including junction-on-cantilever sensors for super-resolution magnetic imaging, vortex-based memory cells, and programmable superconducting diodes. I will also discuss the general requirements, future perspectives, and key challenges in the evolving field of superconducting electronics. |
| title | Planar Josephson junctions for sensors and electronics:Different geometry, new functionality |
| topic | Superconductivity Applied Physics Instrumentation and Detectors |
| url | https://arxiv.org/abs/2511.20424 |