Independent confirmation of transient diamagnetism in driven $\mathrm{YBa_2Cu_3O_6}$.48
This text mentions work from 2024 on. Those parts were partly written without a live literature search and have not been checked by an editor yet.
In plain words
In 2024 a group reported that light-driven $\mathrm{YBa_2Cu_3O_6}$.48 briefly pushes out magnetic field, as a superconductor does. Independent reproduction and other explanations are under discussion.
Precise statement
Fava et al. (Nature 2024) reported a transient diamagnetic response of about 30 percent of complete expulsion after mid-infrared excitation of $\mathrm{YBa_2Cu_3O_6}$.48 above its equilibrium $T_{c}$, measured by Faraday rotation in an adjacent magneto-optic layer. Does an independent measurement with a different probe reproduce the effect, and can non-superconducting mechanisms (photoinduced magnetization changes, thermal or eddy-current effects) be excluded? Answer yes or no.
What would settle it
Reproduction by an independent group with a second probe (e.g. nitrogen-vacancy magnetometry or pickup loops) plus control experiments excluding non-superconducting magnetization.
Status in the literature
Unverified note: it names recent work and was partly written without a live literature search; it awaits a check by an editor.
Reported in 2024 (https://doi.org/10.1038/s41586-024-07635-2); interpretation debated.
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