{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"0805ff11f13693ab3e9053715fe5fbc87eff1f8d57f6949c3827acbd5a44d4ab","created":"2026-10-03T07:18:00Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["3d2c7b020f52c604c4edc5dfc9913a4bc6449c8321932ab6d073d8fff744fa4c","5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"84f1a8f5e621027c3635c520862d8321c6ca13cea489ec5c3034f713cff1953d","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"classification","assisted_by":[],"external_id":"cm.fese-sto-interface.pairing-symmetry","kind":"well-posed","literature_status":"contested","n":"1","parents":[{"note":"Monolayer FeSe/SrTiO3 is one of the hole-pocket-free FeSe systems covered","parent_revision":"3d2c7b020f52c604c4edc5dfc9913a4bc6449c8321932ab6d073d8fff744fa4c","relation":"special_case"}],"plain":"Monolayer FeSe lacks the hole pocket that standard theories of iron-based superconductors rely on, so it is unclear whether the superconducting gap changes sign between its electron pockets.","posed_since":"","precise":"With only electron pockets at M, candidate states are plain s-wave (phonon-assisted), nodeless d-wave (sign change between the two electron pockets), incipient $s\\pm$ (pairing involving a hole band below $E_F$) and states with interband pairing. Determine the relative sign of the gap on the two electron pockets and whether it varies between the two Fe sublattices.","problem_ref":null,"references":"","settled_by":"A phase-sensitive measurement (phase-referenced quasiparticle interference, impurity bound-state spectroscopy, or Josephson interferometry) giving the relative gap sign on the two electron pockets.","status_note":"Scanning tunneling spectroscopy found coherence peaks that differ between the two Fe sublattices, interpreted as $\\eta$-pairing between $k$ and $-k+Q$ (Ding et al., Physical Review Letters 136, 066502, 2026, arXiv 2406.15239).","title":"Pairing symmetry of monolayer FeSe on SrTiO3","topic_ref":"1f178118a7bca814d2960d4dbbdc31dda05ef4474c27f73ec247fd952130449c"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"9ff0930d0137b766b61844e80abee14a6e8de9b896f5982ff408f761b51ec194","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"6af26386417ec866277196716200972d9e5991bc88bad9dfed7b81e243e386f7","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"ZRD1YFiMGOdwFhsJxFWqMGw7_Igoi0CSgRu4fOVIwoglhNeHAYtTvE-IzFiuINJwVKS4bGuPySxTB30mhdzsBw"},"schema":"pubphys.envelope/1"},"record_hash":"9ff0930d0137b766b61844e80abee14a6e8de9b896f5982ff408f761b51ec194","leaf_index":1045}