{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:XY5537RIZTIKO6R4T3ITD4T7W7","short_pith_number":"pith:XY5537RI","canonical_record":{"source":{"id":"1509.02508","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-08T19:36:24Z","cross_cats_sorted":[],"title_canon_sha256":"c45e171818a251a014540e2540387e7ed7f5cb5be2883239fbc880effaecd088","abstract_canon_sha256":"666145bac5784d572971b197a13d10152238075096f7b20f3482c4cff70ac8a9"},"schema_version":"1.0"},"canonical_sha256":"be3bddfe28ccd0a77a3c9ed131f27fb7d9940d1485b6c2a5e3b4cc037d516fc7","source":{"kind":"arxiv","id":"1509.02508","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.02508","created_at":"2026-05-18T01:02:31Z"},{"alias_kind":"arxiv_version","alias_value":"1509.02508v1","created_at":"2026-05-18T01:02:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.02508","created_at":"2026-05-18T01:02:31Z"},{"alias_kind":"pith_short_12","alias_value":"XY5537RIZTIK","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XY5537RIZTIKO6R4","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XY5537RI","created_at":"2026-05-18T12:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:XY5537RIZTIKO6R4T3ITD4T7W7","target":"record","payload":{"canonical_record":{"source":{"id":"1509.02508","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-08T19:36:24Z","cross_cats_sorted":[],"title_canon_sha256":"c45e171818a251a014540e2540387e7ed7f5cb5be2883239fbc880effaecd088","abstract_canon_sha256":"666145bac5784d572971b197a13d10152238075096f7b20f3482c4cff70ac8a9"},"schema_version":"1.0"},"canonical_sha256":"be3bddfe28ccd0a77a3c9ed131f27fb7d9940d1485b6c2a5e3b4cc037d516fc7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:02:31.045675Z","signature_b64":"/dp30gFd68xnk14o6VsjEwGp64D4aTZnLOYCFBd7cOiIeoACSeTDgsFcehy7SnuylaRC+PoDnvrLhgWoI90VDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"be3bddfe28ccd0a77a3c9ed131f27fb7d9940d1485b6c2a5e3b4cc037d516fc7","last_reissued_at":"2026-05-18T01:02:31.044998Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:02:31.044998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.02508","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":"2026-05-18T01:02:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OFbZ3JvtOEGuPdtH7pzglFOFRfpcQyUm7mZDg4C4pkwV1p6Nq1nouSD8gtgF4uuVNMQK96V1wgRqnjMBbdanBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T01:26:25.034976Z"},"content_sha256":"49a158a24d83d350728d0ad410b68dba934c6df06f84f0a01abc63c47684d601","schema_version":"1.0","event_id":"sha256:49a158a24d83d350728d0ad410b68dba934c6df06f84f0a01abc63c47684d601"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:XY5537RIZTIKO6R4T3ITD4T7W7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Metallicity of Ca2Cu6P5 with Single and Double Copper-Pnictide Layers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Athena S. Sefat, David Parker, Georgiy M. Tsoi, Li Li, Miaofang Chi, Yogesh K. Vohra","submitted_at":"2015-09-08T19:36:24Z","abstract_excerpt":"We report thermodynamic and transport properties, and also theoretical calculations, for Cu-based compound Ca2Cu6P5 and compare with CaCu(2-x)P2. Both materials have layers of edge-sharing copper pnictide tetrahedral CuP4, similar to Fe-As and Fe-Se layers (with FeAs4, FeSe4) in the iron-based superconductors. Despite the presence of this similar transition-metal pnictide layer, we find that both Ca2Cu6P5 and CaCu(2-x)P2 have temperature-independent magnetic susceptibility and show metallic behavior with no evidence of either magnetic ordering or superconductivity down to 1.8 K. CaCu(2-x)P2 is"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.02508","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":"2026-05-18T01:02:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nQaBrniM86TDNWGAs8tOEchm3ctMlDVxPTCXdj6AsDpq2cURiS0PJ2FtLHmRaivQiKEuTQiy5mkNcaMlfHnlBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T01:26:25.035591Z"},"content_sha256":"5bffa1acab09b58dc80595d16d0440ce75813a5d02c09de4d9cf549f9806103e","schema_version":"1.0","event_id":"sha256:5bffa1acab09b58dc80595d16d0440ce75813a5d02c09de4d9cf549f9806103e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XY5537RIZTIKO6R4T3ITD4T7W7/bundle.json","state_url":"https://pith.science/pith/XY5537RIZTIKO6R4T3ITD4T7W7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XY5537RIZTIKO6R4T3ITD4T7W7/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":"2026-05-26T01:26:25Z","links":{"resolver":"https://pith.science/pith/XY5537RIZTIKO6R4T3ITD4T7W7","bundle":"https://pith.science/pith/XY5537RIZTIKO6R4T3ITD4T7W7/bundle.json","state":"https://pith.science/pith/XY5537RIZTIKO6R4T3ITD4T7W7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XY5537RIZTIKO6R4T3ITD4T7W7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:XY5537RIZTIKO6R4T3ITD4T7W7","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":"666145bac5784d572971b197a13d10152238075096f7b20f3482c4cff70ac8a9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-08T19:36:24Z","title_canon_sha256":"c45e171818a251a014540e2540387e7ed7f5cb5be2883239fbc880effaecd088"},"schema_version":"1.0","source":{"id":"1509.02508","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.02508","created_at":"2026-05-18T01:02:31Z"},{"alias_kind":"arxiv_version","alias_value":"1509.02508v1","created_at":"2026-05-18T01:02:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.02508","created_at":"2026-05-18T01:02:31Z"},{"alias_kind":"pith_short_12","alias_value":"XY5537RIZTIK","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XY5537RIZTIKO6R4","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XY5537RI","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:5bffa1acab09b58dc80595d16d0440ce75813a5d02c09de4d9cf549f9806103e","target":"graph","created_at":"2026-05-18T01:02:31Z","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":"We report thermodynamic and transport properties, and also theoretical calculations, for Cu-based compound Ca2Cu6P5 and compare with CaCu(2-x)P2. Both materials have layers of edge-sharing copper pnictide tetrahedral CuP4, similar to Fe-As and Fe-Se layers (with FeAs4, FeSe4) in the iron-based superconductors. Despite the presence of this similar transition-metal pnictide layer, we find that both Ca2Cu6P5 and CaCu(2-x)P2 have temperature-independent magnetic susceptibility and show metallic behavior with no evidence of either magnetic ordering or superconductivity down to 1.8 K. CaCu(2-x)P2 is","authors_text":"Athena S. Sefat, David Parker, Georgiy M. Tsoi, Li Li, Miaofang Chi, Yogesh K. Vohra","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-08T19:36:24Z","title":"Metallicity of Ca2Cu6P5 with Single and Double Copper-Pnictide Layers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.02508","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":"sha256:49a158a24d83d350728d0ad410b68dba934c6df06f84f0a01abc63c47684d601","target":"record","created_at":"2026-05-18T01:02:31Z","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":"666145bac5784d572971b197a13d10152238075096f7b20f3482c4cff70ac8a9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-08T19:36:24Z","title_canon_sha256":"c45e171818a251a014540e2540387e7ed7f5cb5be2883239fbc880effaecd088"},"schema_version":"1.0","source":{"id":"1509.02508","kind":"arxiv","version":1}},"canonical_sha256":"be3bddfe28ccd0a77a3c9ed131f27fb7d9940d1485b6c2a5e3b4cc037d516fc7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be3bddfe28ccd0a77a3c9ed131f27fb7d9940d1485b6c2a5e3b4cc037d516fc7","first_computed_at":"2026-05-18T01:02:31.044998Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:02:31.044998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/dp30gFd68xnk14o6VsjEwGp64D4aTZnLOYCFBd7cOiIeoACSeTDgsFcehy7SnuylaRC+PoDnvrLhgWoI90VDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:02:31.045675Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.02508","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:49a158a24d83d350728d0ad410b68dba934c6df06f84f0a01abc63c47684d601","sha256:5bffa1acab09b58dc80595d16d0440ce75813a5d02c09de4d9cf549f9806103e"],"state_sha256":"341ad5b046ea6e04f3f64cebb2f7912a2a14e306c29ca762d890bc121258d5bb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qut8rYtMaXZQR1kbzowFTdpc5FIG5OXK9ZvOCbmAlVj5n81IugTunpn4MMNXsFdXWS6c2tWLGY34EmgZaSMrCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T01:26:25.037967Z","bundle_sha256":"776f52f4dce7544bf0a4d5c5e0ff8402da686598c67a47c517493f0f0c3399d3"}}