{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:GLZSEOH5QVH3QU5DZ37MSOX2B2","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"e711e805a1bd44ade4b6835d295a3f521afd51cf8b0bcefe1184ef531df4dd7f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-02-21T16:11:38Z","title_canon_sha256":"c92419e250bc3a19a4d6cef5a8aa83d8daed8ba35b3c5256e8933c5ef657b4ca"},"schema_version":"1.0","source":{"id":"1302.5320","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.5320","created_at":"2026-05-18T02:55:04Z"},{"alias_kind":"arxiv_version","alias_value":"1302.5320v3","created_at":"2026-05-18T02:55:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.5320","created_at":"2026-05-18T02:55:04Z"},{"alias_kind":"pith_short_12","alias_value":"GLZSEOH5QVH3","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"GLZSEOH5QVH3QU5D","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"GLZSEOH5","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:d65f663eb4d567ac13a4effb95dfdfd392ed9ab0868e4705898ecda7aef21181","target":"graph","created_at":"2026-05-18T02:55:04Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Using the \"break-junction\" technique we prepared and studied superconductor - constriction - superconductor nanocontacts in polycrystalline samples of Fe-based superconductors CeO$_{0.88}$F$_{0.12}$FeAs (Ce-1111; $T_C^{\\rm bulk} = 41 \\pm 1 K$), LaO$_{0.9}$F$_{0.1}$FeAs (La-1111; $T_C^{\\rm bulk} = 28 \\pm 1 K$), and FeSe ($T_C^{\\rm bulk} = 12 \\pm 1 K$). We detected two subharmonic gap structures related with multiple Andreev reflections, indicating the presence of two superconducting gaps with the BCS-ratios $2\\Delta_L/k_BT_C = 4.2 \\div 5.9$ and $2\\Delta_S/k_BT_C\\sim 1 \\ll 3.52$, respectively. T","authors_text":"A.N. Vasiliev, A.S. Usol'tsev, A.V. Sadakov, E.P. Khlybov, M.G. Mikheev, M.V. Sudakova, O.S. Volkova, S.A. Kuzmichev, S.N. Tchesnokov, T.E. Kuzmicheva, Th. Wolf, V.M. Pudalov, Ya.G. Ponomarev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-02-21T16:11:38Z","title":"Multiple Andreev reflections spectroscopy of two-gap 1111- and 11 Fe-based superconductors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.5320","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:425a46a38845803908e0244b54df6b8ec8ad6568f122a5ffc6495786908904bd","target":"record","created_at":"2026-05-18T02:55:04Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e711e805a1bd44ade4b6835d295a3f521afd51cf8b0bcefe1184ef531df4dd7f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-02-21T16:11:38Z","title_canon_sha256":"c92419e250bc3a19a4d6cef5a8aa83d8daed8ba35b3c5256e8933c5ef657b4ca"},"schema_version":"1.0","source":{"id":"1302.5320","kind":"arxiv","version":3}},"canonical_sha256":"32f32238fd854fb853a3cefec93afa0ebcbb8b1374d761c6c1ba73d9feafd728","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"32f32238fd854fb853a3cefec93afa0ebcbb8b1374d761c6c1ba73d9feafd728","first_computed_at":"2026-05-18T02:55:04.288200Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:55:04.288200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"P8T8ymSPkxFCY1suWAi4J0OCnR4vSuLDBeNkV2eeGY9g5wgjkC/6LlAbhew2/mipEWFHyoNQUaN8GpRCKfmwCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:55:04.288885Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.5320","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:425a46a38845803908e0244b54df6b8ec8ad6568f122a5ffc6495786908904bd","sha256:d65f663eb4d567ac13a4effb95dfdfd392ed9ab0868e4705898ecda7aef21181"],"state_sha256":"6cb852fde107f1bfc3b8b3c301e680251ad340cc174f6bddaeae6014d4dcf2bf"}