{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:DKC53HR4THOLBVHG7W6DYS43KC","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":"b31c709f6cffb556d2e16598f21db572125a594b607c5be4fab100714a5b1983","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2014-08-02T07:04:16Z","title_canon_sha256":"8984d25db4471a89b70ce10d763e747fa8a008c21a0d361e40aee7de3b20db80"},"schema_version":"1.0","source":{"id":"1408.0346","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.0346","created_at":"2026-05-18T02:45:57Z"},{"alias_kind":"arxiv_version","alias_value":"1408.0346v1","created_at":"2026-05-18T02:45:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.0346","created_at":"2026-05-18T02:45:57Z"},{"alias_kind":"pith_short_12","alias_value":"DKC53HR4THOL","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DKC53HR4THOLBVHG","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DKC53HR4","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:f55f2437ef06d7b64f368e78c9630a754edcddf7b4735ea6c92dcafbe3657130","target":"graph","created_at":"2026-05-18T02:45:57Z","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":"New iron-based intercalation superconductors Ax(C2H8N2)yFe2-zSe2 (A = Li, Na) with Tc = 45 K have successfully been synthesized via intercalation of dissolved alkaline metal in ethylenediamine. The c-axis lengths of Ax(C2H8N2)yFe2-zSe2 (A = Li, Na) are 20.74(7) {\\AA} and 21.9(1) {\\AA}, respectively, and are about 50 % larger than that of KxFe2Se2, indicating that not only alkaline metal but also ethylenediamine is intercalated between the Se-Se layers of FeSe. It seems that the high-Tc of Ax(C2H8N2)yFe2-zSe2 (A = Li, Na) is caused by the possible two-dimensional electronic structure due to the","authors_text":"Masatsune Kato, Shohei Hosono, Takashi Noji, Takayuki Kawamata, Takehiro Hatakeda, Yoji Koike","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2014-08-02T07:04:16Z","title":"Synthesis and post-annealing effects of alkaline-metal-ethylenediamine-intercalated superconductors Ax(C2H8N2)yFe2-zSe2 (A = Li, Na) with Tc = 45 K"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.0346","kind":"arxiv","version":1},"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":"sha256:34f058fe51d8d0c179c67fde15710682cc33fc6c1df2a8bf93562afa50579397","target":"record","created_at":"2026-05-18T02:45:57Z","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":"b31c709f6cffb556d2e16598f21db572125a594b607c5be4fab100714a5b1983","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2014-08-02T07:04:16Z","title_canon_sha256":"8984d25db4471a89b70ce10d763e747fa8a008c21a0d361e40aee7de3b20db80"},"schema_version":"1.0","source":{"id":"1408.0346","kind":"arxiv","version":1}},"canonical_sha256":"1a85dd9e3c99dcb0d4e6fdbc3c4b9b50aacff6496049430708aba2a44284dc82","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a85dd9e3c99dcb0d4e6fdbc3c4b9b50aacff6496049430708aba2a44284dc82","first_computed_at":"2026-05-18T02:45:57.295102Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:45:57.295102Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WKC19dTRaKQPdbfnbTzIdubL3YLjspreOBRBH/UK178A4g+6yND9/KKVo8h4QEJIaj55RUmx8uggaowAHm0nDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:45:57.295537Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.0346","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:34f058fe51d8d0c179c67fde15710682cc33fc6c1df2a8bf93562afa50579397","sha256:f55f2437ef06d7b64f368e78c9630a754edcddf7b4735ea6c92dcafbe3657130"],"state_sha256":"0101bb6148fa89088af500bb785ac737b2d896dea2182428c744063ae6068e0f"}