On magnetic field screening and expulsion in hydride superconductors

This is the authors' abstract. We don't add key points for this paper.

Ref. [1] (Nat. Commun. 13, 3194 (2022)) presents evidence for magnetic field screening and "subtle" evidence for magnetic field expulsion in hydrides under high pressure, which is argued to support the claim that these materials are high temperature superconductors. We point out here that data presented in different figures of Ref. [1] appear to be inconsistent (i) with one another, (ii) with other work by the same authors on the same samples [2], [3], and (iii) with the expected behavior of standard superconductors. This suggests that these magnetic phenomena reported for these materials are not associated with superconductivity, undermining the claim that these materials are high temperature superconductors.