High efficiency superconducting diode effect in a gate-tunable double-loop SQUID
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866915938406760448 |
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| author | Gibbons, Wyatt Zhang, Teng Barrow, Kevin Lindemann, Tyler Väyrynen, Jukka I. Manfra, Michael J. |
| author_facet | Gibbons, Wyatt Zhang, Teng Barrow, Kevin Lindemann, Tyler Väyrynen, Jukka I. Manfra, Michael J. |
| contents | In superconducting quantum interference devices (SQUIDs), the superconducting diode effect may be generated by interference of multiple harmonic components in the current-phase relationships (CPRs) of different branches forming SQUID loops. Through the inclusion of two gate-tunable Josephson junctions in series in each interference branch of a double-loop SQUID, we demonstrate independent control over both the harmonic content and the amplitude of three interfering CPRs, facilitating significant improvement in the maximum diode efficiency. Through optimized gate-controlled tuning of individual Josephson energies, diode efficiency exceeding 50% is demonstrated. Flux-dependent oscillations show quantitative agreement with a simple model of SQUID operation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_14909 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High efficiency superconducting diode effect in a gate-tunable double-loop SQUID Gibbons, Wyatt Zhang, Teng Barrow, Kevin Lindemann, Tyler Väyrynen, Jukka I. Manfra, Michael J. Superconductivity In superconducting quantum interference devices (SQUIDs), the superconducting diode effect may be generated by interference of multiple harmonic components in the current-phase relationships (CPRs) of different branches forming SQUID loops. Through the inclusion of two gate-tunable Josephson junctions in series in each interference branch of a double-loop SQUID, we demonstrate independent control over both the harmonic content and the amplitude of three interfering CPRs, facilitating significant improvement in the maximum diode efficiency. Through optimized gate-controlled tuning of individual Josephson energies, diode efficiency exceeding 50% is demonstrated. Flux-dependent oscillations show quantitative agreement with a simple model of SQUID operation. |
| title | High efficiency superconducting diode effect in a gate-tunable double-loop SQUID |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2512.14909 |