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. 2023 Apr 26;14:2396. doi: 10.1038/s41467-023-38005-7

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a, b Fraunhofer patterns measured at 500 mK with field sweeping up (a) and down (b) as marked with the black arrows. The white dashed lines mark the 0 current and 0 field positions. The colored arrows highlight a period change in the pattern and the fact that by rotating a by 180° one would get the periodicity of b. c I_c⁺ extracted from the Fraunhofer patterns with the magnetic field sweeping up (blue) and down (red) at 800, 500, and 35 mK. The curves are vertically shifted by 60 nA each for clarity. d Extracted ΔB vs. temperature T for I_c⁺. The red curve is a fit to the Curie–Bloch equation (1–T/T_c)^α with fitting parameters T_c ~750 ± 25 mK and α ~0.4 ± 0.05. The error bars are defined as the standard deviation of the extracted I_c values as explained in the SI.