{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:T25C47EMTKRYAIOJJQVW4CPYKG","short_pith_number":"pith:T25C47EM","canonical_record":{"source":{"id":"1202.4340","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-02-20T14:53:30Z","cross_cats_sorted":[],"title_canon_sha256":"a4764403447443172ea3f4be3b3f4ebf88d6c4253ec72ce231ecd67cd3335668","abstract_canon_sha256":"04fd95c0465a0c632db5586a71373f58534db58da5bf487036e0dfecf3e2481b"},"schema_version":"1.0"},"canonical_sha256":"9eba2e7c8c9aa38021c94c2b6e09f851964052a6e790bab85d01612d20a38d00","source":{"kind":"arxiv","id":"1202.4340","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.4340","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"arxiv_version","alias_value":"1202.4340v2","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.4340","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"pith_short_12","alias_value":"T25C47EMTKRY","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"T25C47EMTKRYAIOJ","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"T25C47EM","created_at":"2026-05-18T12:27:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:T25C47EMTKRYAIOJJQVW4CPYKG","target":"record","payload":{"canonical_record":{"source":{"id":"1202.4340","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-02-20T14:53:30Z","cross_cats_sorted":[],"title_canon_sha256":"a4764403447443172ea3f4be3b3f4ebf88d6c4253ec72ce231ecd67cd3335668","abstract_canon_sha256":"04fd95c0465a0c632db5586a71373f58534db58da5bf487036e0dfecf3e2481b"},"schema_version":"1.0"},"canonical_sha256":"9eba2e7c8c9aa38021c94c2b6e09f851964052a6e790bab85d01612d20a38d00","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:54:47.637457Z","signature_b64":"49M0FiEzrrDjYxJnYwsGwSwnH+JWbH1gN9Sm1vt8RgVKekZpouvizmEN9fI5NZZ3OgZCczD+Mk+4F670VymmCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9eba2e7c8c9aa38021c94c2b6e09f851964052a6e790bab85d01612d20a38d00","last_reissued_at":"2026-05-18T03:54:47.636971Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:54:47.636971Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.4340","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:54:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BFlH6A4hCWphl9NTInBoLfcOggvUJkKN5CXMNqBoUFdzGnZaGRY+MdF9WSWpL/diG0yntNTHlSYqLsJZ3fjEAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:46:45.756192Z"},"content_sha256":"afb2d645c8ef06083343bf6f1cfb968e1d3b34ba1773ba005251edfbf9314b15","schema_version":"1.0","event_id":"sha256:afb2d645c8ef06083343bf6f1cfb968e1d3b34ba1773ba005251edfbf9314b15"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:T25C47EMTKRYAIOJJQVW4CPYKG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation of superconductivity at 30 K~46 K in AxFe2Se2 (A = Li, Na, Ba, Sr, Ca, Yb, and Eu)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"G. Wang, H. Zhang, S. F. Jin, T. P. Ying, T. T. Zhou, W. Y. Wang, X. F. Lai, X. L. Chen","submitted_at":"2012-02-20T14:53:30Z","abstract_excerpt":"New iron selenide superconductors by intercalating smaller-sized alkali metals (Li, Na) and alkaline earths using high-temperature routes have been pursued ever since the discovery of superconductivity at about 30 K in KFe2Se2, but all have failed so far. Here we demonstrate that a series of superconductors with enhanced Tc=30~46 K can be obtained by intercalating metals, Li, Na, Ba, Sr, Ca, Yb, and Eu in between FeSe layers by the ammonothermal method at room temperature. Analysis on their powder X-ray diffraction patterns reveals that all the main phases can be indexed based on body-centered"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.4340","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:54:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zaGPpY/7YlRa7zVboptYId5CGmv7oKN9HDPvmxElae81Qkze9r5pSW5+ZyNg68FWhCxppkHSaKLF9fK6mqcFDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:46:45.756964Z"},"content_sha256":"aa597acd30fac157e27111266d2f6ae92d0f3aa37f51334eb939b87c226b08d9","schema_version":"1.0","event_id":"sha256:aa597acd30fac157e27111266d2f6ae92d0f3aa37f51334eb939b87c226b08d9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T25C47EMTKRYAIOJJQVW4CPYKG/bundle.json","state_url":"https://pith.science/pith/T25C47EMTKRYAIOJJQVW4CPYKG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T25C47EMTKRYAIOJJQVW4CPYKG/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T18:46:45Z","links":{"resolver":"https://pith.science/pith/T25C47EMTKRYAIOJJQVW4CPYKG","bundle":"https://pith.science/pith/T25C47EMTKRYAIOJJQVW4CPYKG/bundle.json","state":"https://pith.science/pith/T25C47EMTKRYAIOJJQVW4CPYKG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T25C47EMTKRYAIOJJQVW4CPYKG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:T25C47EMTKRYAIOJJQVW4CPYKG","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":"04fd95c0465a0c632db5586a71373f58534db58da5bf487036e0dfecf3e2481b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-02-20T14:53:30Z","title_canon_sha256":"a4764403447443172ea3f4be3b3f4ebf88d6c4253ec72ce231ecd67cd3335668"},"schema_version":"1.0","source":{"id":"1202.4340","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.4340","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"arxiv_version","alias_value":"1202.4340v2","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.4340","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"pith_short_12","alias_value":"T25C47EMTKRY","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"T25C47EMTKRYAIOJ","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"T25C47EM","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:aa597acd30fac157e27111266d2f6ae92d0f3aa37f51334eb939b87c226b08d9","target":"graph","created_at":"2026-05-18T03:54:47Z","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 selenide superconductors by intercalating smaller-sized alkali metals (Li, Na) and alkaline earths using high-temperature routes have been pursued ever since the discovery of superconductivity at about 30 K in KFe2Se2, but all have failed so far. Here we demonstrate that a series of superconductors with enhanced Tc=30~46 K can be obtained by intercalating metals, Li, Na, Ba, Sr, Ca, Yb, and Eu in between FeSe layers by the ammonothermal method at room temperature. Analysis on their powder X-ray diffraction patterns reveals that all the main phases can be indexed based on body-centered","authors_text":"G. Wang, H. Zhang, S. F. Jin, T. P. Ying, T. T. Zhou, W. Y. Wang, X. F. Lai, X. L. Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-02-20T14:53:30Z","title":"Observation of superconductivity at 30 K~46 K in AxFe2Se2 (A = Li, Na, Ba, Sr, Ca, Yb, and Eu)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.4340","kind":"arxiv","version":2},"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:afb2d645c8ef06083343bf6f1cfb968e1d3b34ba1773ba005251edfbf9314b15","target":"record","created_at":"2026-05-18T03:54:47Z","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":"04fd95c0465a0c632db5586a71373f58534db58da5bf487036e0dfecf3e2481b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-02-20T14:53:30Z","title_canon_sha256":"a4764403447443172ea3f4be3b3f4ebf88d6c4253ec72ce231ecd67cd3335668"},"schema_version":"1.0","source":{"id":"1202.4340","kind":"arxiv","version":2}},"canonical_sha256":"9eba2e7c8c9aa38021c94c2b6e09f851964052a6e790bab85d01612d20a38d00","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9eba2e7c8c9aa38021c94c2b6e09f851964052a6e790bab85d01612d20a38d00","first_computed_at":"2026-05-18T03:54:47.636971Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:54:47.636971Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"49M0FiEzrrDjYxJnYwsGwSwnH+JWbH1gN9Sm1vt8RgVKekZpouvizmEN9fI5NZZ3OgZCczD+Mk+4F670VymmCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:54:47.637457Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.4340","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:afb2d645c8ef06083343bf6f1cfb968e1d3b34ba1773ba005251edfbf9314b15","sha256:aa597acd30fac157e27111266d2f6ae92d0f3aa37f51334eb939b87c226b08d9"],"state_sha256":"c6d12c66458ded4cdf1adb3b0757b147b93b711b772914415e71857995bf73a7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"52k+D0utU0cuXc6kcFpZnLH6YsRfGAnkENpijhHaBSrVNrmZU3Tzq7OHc41FY7+3ElWa+hL4mqi9hf4HKibADw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T18:46:45.760387Z","bundle_sha256":"a6029f1a3f9daf23684fd2ac619f0548416bdf03c8a38efe20438cb8cc22ecbc"}}