{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"5e2b052b8e3d467a8a82977cf80932e60246e28329288806b41a297dbc7ae490","created":"2026-10-03T07:18:00Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"38a1a99cfd50312d5aaf1b1df384f16d75e0706934a5e7b4b83fd4c30907ee6c","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.iron-based.bogoliubov-fermi-surface","kind":"well-posed","literature_status":"contested","n":"1","parents":[],"plain":"Beyond the nematic critical point, $\\mathrm{FeSe}1-x\\mathrm{S}x$ keeps many zero-energy excitations inside its superconducting state, which may signal surfaces of zero-energy quasiparticles (Bogoliubov Fermi surfaces) or simply disorder.","posed_since":"","precise":"For tetragonal FeSe1-xSx with $x > 0.17$, determine whether the large residual zero-energy density of states measured by specific heat, thermal conductivity and tunneling comes from Bogoliubov Fermi surfaces of a time-reversal-breaking or interband-pairing state, or from pair breaking by disorder. An answer is a measurement of the dependence of the residual density of states on controlled disorder and field, compared with both scenarios.","problem_ref":null,"references":"","settled_by":"Electron-irradiation series and muSR or Kerr tests for time-reversal breaking on the same crystals, together with field-dependent tunneling.","status_note":"","title":"Does tetragonal FeSe1-xSx host Bogoliubov Fermi surfaces","topic_ref":"71fc7a5f7f45e0e897c1da37458bfa12479b8a0797fe32805a586a3c8fc44007"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"54b33276e11f43af61d6e6d94c25b4e24d91484aaf557574c618ce9063443929","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"b04f3dc3c30e1342319459f558cf02d557aa9a0cf54b9d11108d67ce1175011c","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"3sI6bpcI7nytUO2OKts9aond9Hrdz_e58pR53vrbhblsINPN-yjg0yurjeNZ1TPRO3mgdL_Pt744X_rWSnraCQ"},"schema":"pubphys.envelope/1"},"record_hash":"54b33276e11f43af61d6e6d94c25b4e24d91484aaf557574c618ce9063443929","leaf_index":1043}