{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:C2RZOA7BRLKXOYH4LJS6QUTBTT","short_pith_number":"pith:C2RZOA7B","canonical_record":{"source":{"id":"0903.0629","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-03-03T21:35:07Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"dd9a5ce1f38c65133e503653c65456918073494a34c08624da9c334a57379d6c","abstract_canon_sha256":"4f6e28e89534cc191b8609c3fbc3cca667c29c3e23532516170e4c7f5720df9f"},"schema_version":"1.0"},"canonical_sha256":"16a39703e18ad57760fc5a65e852619ccf029bf50071bd8dc49461364dce2028","source":{"kind":"arxiv","id":"0903.0629","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.0629","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"arxiv_version","alias_value":"0903.0629v1","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.0629","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"pith_short_12","alias_value":"C2RZOA7BRLKX","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"C2RZOA7BRLKXOYH4","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"C2RZOA7B","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:C2RZOA7BRLKXOYH4LJS6QUTBTT","target":"record","payload":{"canonical_record":{"source":{"id":"0903.0629","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-03-03T21:35:07Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"dd9a5ce1f38c65133e503653c65456918073494a34c08624da9c334a57379d6c","abstract_canon_sha256":"4f6e28e89534cc191b8609c3fbc3cca667c29c3e23532516170e4c7f5720df9f"},"schema_version":"1.0"},"canonical_sha256":"16a39703e18ad57760fc5a65e852619ccf029bf50071bd8dc49461364dce2028","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:37.505182Z","signature_b64":"wT/NOodRoMT5oD8K3pBjJxbARlocl/Ey9nDKOXAOFZIO+B591aqYDT21B8qUvedvMNK6V/JQhkLV+LiWOqveCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16a39703e18ad57760fc5a65e852619ccf029bf50071bd8dc49461364dce2028","last_reissued_at":"2026-05-18T02:14:37.504482Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:37.504482Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0903.0629","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:14:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TLD/RZbwi4tLS5ZxwyBJADZEi+z8LEg3/A5ScCu+h9O+2ata7HX3wzZBiqHofgn/isQr8OIELRBU0kTINxKyDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T06:31:35.802347Z"},"content_sha256":"50cce4421f43693dee2eb676f5f62b9bb6a6b9e24c667690628825e12fa5490d","schema_version":"1.0","event_id":"sha256:50cce4421f43693dee2eb676f5f62b9bb6a6b9e24c667690628825e12fa5490d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:C2RZOA7BRLKXOYH4LJS6QUTBTT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"BaT2As2 Single Crystals (T = Fe, Co, Ni) and Superconductivity upon Co-doping","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Athena S. Sefat, Brian C. Sales, David J. Singh, David Mandrus, Filip Ronning, Michael A. McGuire, Rongying Jin","submitted_at":"2009-03-03T21:35:07Z","abstract_excerpt":"The crystal structure and physical properties of BaFe2As2, BaCo2As2, and BaNi2As2 single crystals are surveyed. BaFe2As2 gives a magnetic and structural transition at TN = 132(1) K, BaCo2As2 is a paramagnetic metal, while BaNi2As2 has a structural phase transition at T0 = 131 K, followed by superconductivity below Tc = 0.69 K. The bulk superconductivity in Co-doped BaFe2As2 below Tc = 22 K is demonstrated by resistivity, magnetic susceptibility, and specific heat data. In contrast to the cuprates, the Fe-based system appears to tolerate considerable disorder in the transition metal layers. Fir"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.0629","kind":"arxiv","version":1},"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":"2026-05-18T02:14:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"39bdwynlL/8gPk7EXIPTsNcg4pbCHUhpBCoLqfWdmvZ7JyNl3jw+/1UMMESB4o9xJDJLi2mo1Y+3Xp3NAGxtDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T06:31:35.802987Z"},"content_sha256":"c2360dfcc221e08e8b9ad4264a4c639f1b6ee9650c70597179b4861a86c83f94","schema_version":"1.0","event_id":"sha256:c2360dfcc221e08e8b9ad4264a4c639f1b6ee9650c70597179b4861a86c83f94"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C2RZOA7BRLKXOYH4LJS6QUTBTT/bundle.json","state_url":"https://pith.science/pith/C2RZOA7BRLKXOYH4LJS6QUTBTT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C2RZOA7BRLKXOYH4LJS6QUTBTT/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":"2026-05-25T06:31:35Z","links":{"resolver":"https://pith.science/pith/C2RZOA7BRLKXOYH4LJS6QUTBTT","bundle":"https://pith.science/pith/C2RZOA7BRLKXOYH4LJS6QUTBTT/bundle.json","state":"https://pith.science/pith/C2RZOA7BRLKXOYH4LJS6QUTBTT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C2RZOA7BRLKXOYH4LJS6QUTBTT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:C2RZOA7BRLKXOYH4LJS6QUTBTT","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":"4f6e28e89534cc191b8609c3fbc3cca667c29c3e23532516170e4c7f5720df9f","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-03-03T21:35:07Z","title_canon_sha256":"dd9a5ce1f38c65133e503653c65456918073494a34c08624da9c334a57379d6c"},"schema_version":"1.0","source":{"id":"0903.0629","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.0629","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"arxiv_version","alias_value":"0903.0629v1","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.0629","created_at":"2026-05-18T02:14:37Z"},{"alias_kind":"pith_short_12","alias_value":"C2RZOA7BRLKX","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"C2RZOA7BRLKXOYH4","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"C2RZOA7B","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:c2360dfcc221e08e8b9ad4264a4c639f1b6ee9650c70597179b4861a86c83f94","target":"graph","created_at":"2026-05-18T02:14:37Z","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":"The crystal structure and physical properties of BaFe2As2, BaCo2As2, and BaNi2As2 single crystals are surveyed. BaFe2As2 gives a magnetic and structural transition at TN = 132(1) K, BaCo2As2 is a paramagnetic metal, while BaNi2As2 has a structural phase transition at T0 = 131 K, followed by superconductivity below Tc = 0.69 K. The bulk superconductivity in Co-doped BaFe2As2 below Tc = 22 K is demonstrated by resistivity, magnetic susceptibility, and specific heat data. In contrast to the cuprates, the Fe-based system appears to tolerate considerable disorder in the transition metal layers. Fir","authors_text":"Athena S. Sefat, Brian C. Sales, David J. Singh, David Mandrus, Filip Ronning, Michael A. McGuire, Rongying Jin","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-03-03T21:35:07Z","title":"BaT2As2 Single Crystals (T = Fe, Co, Ni) and Superconductivity upon Co-doping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.0629","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":"sha256:50cce4421f43693dee2eb676f5f62b9bb6a6b9e24c667690628825e12fa5490d","target":"record","created_at":"2026-05-18T02:14:37Z","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":"4f6e28e89534cc191b8609c3fbc3cca667c29c3e23532516170e4c7f5720df9f","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-03-03T21:35:07Z","title_canon_sha256":"dd9a5ce1f38c65133e503653c65456918073494a34c08624da9c334a57379d6c"},"schema_version":"1.0","source":{"id":"0903.0629","kind":"arxiv","version":1}},"canonical_sha256":"16a39703e18ad57760fc5a65e852619ccf029bf50071bd8dc49461364dce2028","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16a39703e18ad57760fc5a65e852619ccf029bf50071bd8dc49461364dce2028","first_computed_at":"2026-05-18T02:14:37.504482Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:14:37.504482Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wT/NOodRoMT5oD8K3pBjJxbARlocl/Ey9nDKOXAOFZIO+B591aqYDT21B8qUvedvMNK6V/JQhkLV+LiWOqveCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:14:37.505182Z","signed_message":"canonical_sha256_bytes"},"source_id":"0903.0629","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:50cce4421f43693dee2eb676f5f62b9bb6a6b9e24c667690628825e12fa5490d","sha256:c2360dfcc221e08e8b9ad4264a4c639f1b6ee9650c70597179b4861a86c83f94"],"state_sha256":"ca5ebe2dcc16f7223a65a77a97e8ce299d6e759a48e0fc6a8ff0a3af4aa24aa0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h8TMXL/WUGv9xeHjU2Wari5jQeLAPQBT/Dul2bpbZlE4tltzHARvo1azpbAeVg11wBWX/Zdu3hDRhhWekeFRAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T06:31:35.806440Z","bundle_sha256":"fbd1c4f902d90f008eb9f4755b505519817b37fdd3bd1ed6a1f1326d8e7c955d"}}