Multiquanta flux jumps in superconducting fractal
Abstract We study the magnetic field response of millimeter scale fractal Sierpinski gaskets (SG) assembled of superconducting equilateral triangular patches. Directly imaged quantitative induction maps reveal hierarchical periodic filling of enclosed void areas with multiquanta magnetic flux, which...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-08-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-39733-y |
| _version_ | 1797559582498750464 |
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| author | Vitalii K. Vlasko-Vlasov Ralu Divan Daniel Rosenmann Ulrich Welp Andreas Glatz Wai-Kwong Kwok |
| author_facet | Vitalii K. Vlasko-Vlasov Ralu Divan Daniel Rosenmann Ulrich Welp Andreas Glatz Wai-Kwong Kwok |
| author_sort | Vitalii K. Vlasko-Vlasov |
| collection | DOAJ |
| description | Abstract We study the magnetic field response of millimeter scale fractal Sierpinski gaskets (SG) assembled of superconducting equilateral triangular patches. Directly imaged quantitative induction maps reveal hierarchical periodic filling of enclosed void areas with multiquanta magnetic flux, which jumps inside the voids in repeating bundles of individual flux quanta Φ0. The number Ns of entering flux quanta in different triangular voids of the SG is proportional to the linear size s of the void, while the field periodicity of flux jumps varies as 1/s. We explain this behavior by modeling the triangular voids in the SG with effective superconducting rings and by calculating their response following the London analysis of persistent currents, Js, induced by the applied field H a and by the entering flux. With changing H a , Js reaches a critical value in the vertex joints that connect the triangular superconducting patches and allows the giant flux jumps into the SG voids through phase slips or multiple Abrikosov vortex transfer across the vertices. The unique flux behavior in superconducting SG patterns, may be used to design tunable low-loss resonators with multi-line high-frequency spectrum for microwave technologies. |
| first_indexed | 2024-03-10T17:47:27Z |
| format | Article |
| id | doaj.art-f6490f63561e406a9650498807b0900b |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-10T17:47:27Z |
| publishDate | 2023-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-f6490f63561e406a9650498807b0900b2023-11-20T09:28:54ZengNature PortfolioScientific Reports2045-23222023-08-0113111310.1038/s41598-023-39733-yMultiquanta flux jumps in superconducting fractalVitalii K. Vlasko-Vlasov0Ralu Divan1Daniel Rosenmann2Ulrich Welp3Andreas Glatz4Wai-Kwong Kwok5Materials Science Division, Argonne National LaboratoryCenter for Nanoscale Materials, Argonne National LaboratoryCenter for Nanoscale Materials, Argonne National LaboratoryMaterials Science Division, Argonne National LaboratoryMaterials Science Division, Argonne National LaboratoryMaterials Science Division, Argonne National LaboratoryAbstract We study the magnetic field response of millimeter scale fractal Sierpinski gaskets (SG) assembled of superconducting equilateral triangular patches. Directly imaged quantitative induction maps reveal hierarchical periodic filling of enclosed void areas with multiquanta magnetic flux, which jumps inside the voids in repeating bundles of individual flux quanta Φ0. The number Ns of entering flux quanta in different triangular voids of the SG is proportional to the linear size s of the void, while the field periodicity of flux jumps varies as 1/s. We explain this behavior by modeling the triangular voids in the SG with effective superconducting rings and by calculating their response following the London analysis of persistent currents, Js, induced by the applied field H a and by the entering flux. With changing H a , Js reaches a critical value in the vertex joints that connect the triangular superconducting patches and allows the giant flux jumps into the SG voids through phase slips or multiple Abrikosov vortex transfer across the vertices. The unique flux behavior in superconducting SG patterns, may be used to design tunable low-loss resonators with multi-line high-frequency spectrum for microwave technologies.https://doi.org/10.1038/s41598-023-39733-y |
| spellingShingle | Vitalii K. Vlasko-Vlasov Ralu Divan Daniel Rosenmann Ulrich Welp Andreas Glatz Wai-Kwong Kwok Multiquanta flux jumps in superconducting fractal Scientific Reports |
| title | Multiquanta flux jumps in superconducting fractal |
| title_full | Multiquanta flux jumps in superconducting fractal |
| title_fullStr | Multiquanta flux jumps in superconducting fractal |
| title_full_unstemmed | Multiquanta flux jumps in superconducting fractal |
| title_short | Multiquanta flux jumps in superconducting fractal |
| title_sort | multiquanta flux jumps in superconducting fractal |
| url | https://doi.org/10.1038/s41598-023-39733-y |
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