{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"29f8e95f5a1a30925f3afe57aaf9ca88d110f584d1bc368ce39ba42b12064225","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b","f2f2aae13ece43527ab233e3180386512a2150ccffaedb8b9b05a70a9b945064"],"salt":"fe0423bdaff3278056ec913d377bbe44fe252c1440b006408a2c2581cb22e0ff","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.sr2ruo4.two-component","kind":"well-posed","literature_status":"contested","n":"2","parents":[],"plain":"If the order parameter has two parts, squeezing the crystal along one axis should split the superconducting transition into two; one probe sees a split and another does not.","posed_since":"","precise":"Determine whether uniaxial stress along $[100]$ splits $T_c$ of $\\mathrm{Sr_2RuO_4}$ into two thermodynamic transitions, as a two-component order parameter (multidimensional representation or accidental degeneracy) requires. An answer is a thermodynamic detection of the second transition, or a bound on its specific-heat jump below the value predicted by models fitted to the ultrasound data.","problem_ref":"f2f2aae13ece43527ab233e3180386512a2150ccffaedb8b9b05a70a9b945064","references":"","settled_by":"Calorimetry or elastocaloric measurements under stress with sensitivity below the predicted second-jump size, on the same samples used for muSR.","status_note":"muSR under stress (2021) reported split onsets of superconductivity and time-reversal breaking, while heat capacity under stress found no second transition above a few percent of the main anomaly.","title":"Is the $\\mathrm{Sr_2RuO_4}$ order parameter two-component?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"6a7db53e1d4cc8169ea85c6b47a129aa8b91e8eba7fc5221a2f4e031b4ac8c19","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"fcae10196680390ec7252b32537f89ba99aad04621d6f441e75ece8443351c55","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"bz5K6WZrBRW05v8CmCdDupszwO-n9ywHLXdHA4anB3rCIk8kv2yvgcXLRZlftQOQLnOm41-DXcraXGvuZuQGAA"},"schema":"pubphys.envelope/1"},"record_hash":"6a7db53e1d4cc8169ea85c6b47a129aa8b91e8eba7fc5221a2f4e031b4ac8c19","leaf_index":3058}