{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"5eb68cfdaae046c35f35d29c74f6721dd3f664ee18bc6351c0215975a09365ea","created":"2026-10-03T07:17:59Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"812365898399d2c2bdbf0655466d706d570e2963eda598bfa43b393befed91c6","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"identification","assisted_by":[],"external_id":"cm.deconfined-criticality.material-realization","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"Deconfined criticality has been seen mostly in computer models. The goal is a real magnet where the change from magnetic order to a pattern of spin singlets happens continuously or nearly so.","posed_since":"","precise":"Identify a quasi-2D $S = 1/2$ magnet tunable by pressure, field or chemistry through a Neel to VBS (or plaquette) transition, and determine whether the transition is continuous with measured exponents or first order with a measured order-parameter jump. Candidates include SrCu2(BO3)2 under pressure and field. An answer is the material with the measured character of the transition.","problem_ref":null,"references":"","settled_by":"Neutron diffraction and NMR across the transition under pressure resolving both order parameters and any coexistence region.","status_note":"Cui et al. (Science 2023) reported a proximate deconfined critical point in SrCu2(BO3)2 with a weakly first-order transition.","title":"Find a material with a continuous Neel to valence-bond-solid transition","topic_ref":"2349550dc7ce2650de0f02331c77da4c02e3e4166a157a99e1d2814209a4678f"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"5125c20b2f905c88d5fce9c4724b28537e56977c73eab366962e049b3b126ddc","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"23372e528bc6cd7f90b422921c05a8cb0bfea8b5211815ac89eae0ea2ac9a526","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"qeNGHBAJCD3xb_fwNPActgJOJeZHGbEhdegECNaGHxZ9i0aGSGycSxPoDmeAa_rLP7Y-OpMZZ9Nzu3cB7rg6BQ"},"schema":"pubphys.envelope/1"},"record_hash":"5125c20b2f905c88d5fce9c4724b28537e56977c73eab366962e049b3b126ddc","leaf_index":940}