Superconducting devices ubiquitously have an excess of broken Cooper pairs, which can hamper their performance. It is widely believed that external radiation is responsible but a study now suggests there must be an additional, unknown source.
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Higginbotham, A.P. A secret source. Nat. Phys. 18, 126 (2022). https://doi.org/10.1038/s41567-021-01459-x
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DOI: https://doi.org/10.1038/s41567-021-01459-x
