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Comment on "Trapped flux in a small crystal of CaKFe$_4$As$_4$ at ambient pressure and in a diamond anvil pressure cell" by S. L. Bud'ko et al

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arxiv 2405.17500 v2 pith:33QPUD2K submitted 2024-05-26 cond-mat.supr-con

classification cond-mat.supr-con
keywords pressureevidencefluxtrappedunderhydridesinterpretationmeasurements
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abstract

In their paper arXiv:2405.08189, Supercond. Sci. Technol. 37 (2024) 065010 [1], Bud'ko et al. present experimental results for trapped magnetic flux for a tiny sample of a type II superconductor. The paper aims to provide evidence in support of the interpretation that similar measurements performed in samples of hydrogen-rich materials under high pressure by Minkov, Bud'ko and coauthors [2] are conclusive evidence [3] for superconductivity in hydrides under pressure. Here we point out that the new evidence presented by Bud'ko et al. [1] further supports our interpretation [4],[5] that the reported measurements of trapped flux on hydrides under pressure [2] are evidence that the samples are $not$ superconducting.

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  1. Reply to "Is $MgB_2$ a superconductor? Comment on "Evidence Against Superconductivity in Flux Trapping Experiments on Hydrides Under High Pressure" "

    cond-mat.supr-con 2024-11 conditional novelty 2.0 of 10

    Hirsch and Marsiglio rebut claims that their Bean-model analysis of trapped flux misrepresents the Meissner state, arguing the Comment plotted their equations outside their valid field range.

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