{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"ffc3c7c64fdaf7344d37b6918edbfdfff1740ca9499225aca9cc84f79b59d719","created":"2026-10-03T07:18:00Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"592c345f8bc1ca09bcba6e2aeb41ce2febeb8fee55f84786a76f76ff0a08c459","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.light-induced-sc.ybco-diamagnetism-replication","kind":"well-posed","literature_status":"contested","n":"1","parents":[],"plain":"In 2024 a group reported that light-driven YBa2Cu3O6.48 briefly pushes out magnetic field, as a superconductor does. Independent reproduction and other explanations are under discussion.","posed_since":"2024","precise":"Fava et al. (Nature 2024) reported a transient diamagnetic response of about 30 percent of complete expulsion after mid-infrared excitation of YBa2Cu3O6.48 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.","problem_ref":null,"references":"","settled_by":"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_note":"Reported in 2024 (https://doi.org/10.1038/s41586-024-07635-2); interpretation debated.","title":"Independent confirmation of transient diamagnetism in driven YBa2Cu3O6.48","topic_ref":"a4f7f1ae5dbd43b5f6c513a7a2b6e1f0d22cc39b03da4e8f25e23fa5acb4d309"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"4a9b4cb402330cb75f4d148df628669e883750580c6bfece7ec56b60b55e5a04","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"51a739b992b3f7e3ea6fd8e5ffbbef9d14f2fbda19cc2d8985d70440760bdcaa","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"Z0QjoYYnUCyKgf4nCZZkaDtWQNeG06WN07SG-3E9YK9-wfXiKuTHh9DgDAN8QGw3V1yzQmAcbby2g6sSHPxFCA"},"schema":"pubphys.envelope/1"},"record_hash":"4a9b4cb402330cb75f4d148df628669e883750580c6bfece7ec56b60b55e5a04","leaf_index":1068}