Sign reversal diode effect in superconducting Dayem nanobridges
Abstract Supercurrent diodes are nonreciprocal electronic elements whose switching current depends on their flow direction. Recently, a variety of composite systems combining different materials and engineered asymmetric superconducting devices have been proposed. Yet, ease of fabrication and tunabl...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-11-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-023-01458-9 |
| _version_ | 1797414882468954112 |
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| author | Daniel Margineda Alessandro Crippa Elia Strambini Yuri Fukaya Maria Teresa Mercaldo Mario Cuoco Francesco Giazotto |
| author_facet | Daniel Margineda Alessandro Crippa Elia Strambini Yuri Fukaya Maria Teresa Mercaldo Mario Cuoco Francesco Giazotto |
| author_sort | Daniel Margineda |
| collection | DOAJ |
| description | Abstract Supercurrent diodes are nonreciprocal electronic elements whose switching current depends on their flow direction. Recently, a variety of composite systems combining different materials and engineered asymmetric superconducting devices have been proposed. Yet, ease of fabrication and tunable sign of supercurrent rectification joined to large efficiency have not been assessed in a single platform so far. We demonstrate that all-metallic superconducting Dayem nanobridges naturally exhibit nonreciprocal supercurrents under an external magnetic field, with a rectification efficiency up to ~ 27%. Our niobium nanostructures are tailored so that the diode polarity can be tuned by varying the amplitude of an out-of-plane magnetic field or the temperature in a regime without magnetic screening. We show that sign reversal of the diode effect may arise from the high-harmonic content of the current phase relation in combination with vortex phase windings present in the bridge or an anomalous phase shift compatible with anisotropic spin-orbit interactions. |
| first_indexed | 2024-03-09T05:40:27Z |
| format | Article |
| id | doaj.art-a852c8824a674ffb9a8acccb0a8f331d |
| institution | Directory Open Access Journal |
| issn | 2399-3650 |
| language | English |
| last_indexed | 2024-03-09T05:40:27Z |
| publishDate | 2023-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj.art-a852c8824a674ffb9a8acccb0a8f331d2023-12-03T12:25:22ZengNature PortfolioCommunications Physics2399-36502023-11-01611910.1038/s42005-023-01458-9Sign reversal diode effect in superconducting Dayem nanobridgesDaniel Margineda0Alessandro Crippa1Elia Strambini2Yuri Fukaya3Maria Teresa Mercaldo4Mario Cuoco5Francesco Giazotto6NEST Istituto Nanoscienze-CNR and Scuola Normale SuperioreNEST Istituto Nanoscienze-CNR and Scuola Normale SuperioreNEST Istituto Nanoscienze-CNR and Scuola Normale SuperioreSPIN-CNRDipartimento di Fisica “E. R. Caianiello”, Università di SalernoSPIN-CNRNEST Istituto Nanoscienze-CNR and Scuola Normale SuperioreAbstract Supercurrent diodes are nonreciprocal electronic elements whose switching current depends on their flow direction. Recently, a variety of composite systems combining different materials and engineered asymmetric superconducting devices have been proposed. Yet, ease of fabrication and tunable sign of supercurrent rectification joined to large efficiency have not been assessed in a single platform so far. We demonstrate that all-metallic superconducting Dayem nanobridges naturally exhibit nonreciprocal supercurrents under an external magnetic field, with a rectification efficiency up to ~ 27%. Our niobium nanostructures are tailored so that the diode polarity can be tuned by varying the amplitude of an out-of-plane magnetic field or the temperature in a regime without magnetic screening. We show that sign reversal of the diode effect may arise from the high-harmonic content of the current phase relation in combination with vortex phase windings present in the bridge or an anomalous phase shift compatible with anisotropic spin-orbit interactions.https://doi.org/10.1038/s42005-023-01458-9 |
| spellingShingle | Daniel Margineda Alessandro Crippa Elia Strambini Yuri Fukaya Maria Teresa Mercaldo Mario Cuoco Francesco Giazotto Sign reversal diode effect in superconducting Dayem nanobridges Communications Physics |
| title | Sign reversal diode effect in superconducting Dayem nanobridges |
| title_full | Sign reversal diode effect in superconducting Dayem nanobridges |
| title_fullStr | Sign reversal diode effect in superconducting Dayem nanobridges |
| title_full_unstemmed | Sign reversal diode effect in superconducting Dayem nanobridges |
| title_short | Sign reversal diode effect in superconducting Dayem nanobridges |
| title_sort | sign reversal diode effect in superconducting dayem nanobridges |
| url | https://doi.org/10.1038/s42005-023-01458-9 |
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