{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:P3MOQIYJ6TD64JSBMSWKK52P4J","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":"fe99e74d8135f18fd51d93774a0fc21c7863cc9e5e220461c24c84eadb3f2626","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-09-04T02:23:25Z","title_canon_sha256":"730b4e0f050bb1a9725847daff9a19d01be551b2ccad1b7c895f53bbb379d748"},"schema_version":"1.0","source":{"id":"0809.0735","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0809.0735","created_at":"2026-07-04T17:12:34Z"},{"alias_kind":"arxiv_version","alias_value":"0809.0735v1","created_at":"2026-07-04T17:12:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.0735","created_at":"2026-07-04T17:12:34Z"},{"alias_kind":"pith_short_12","alias_value":"P3MOQIYJ6TD6","created_at":"2026-07-04T17:12:34Z"},{"alias_kind":"pith_short_16","alias_value":"P3MOQIYJ6TD64JSB","created_at":"2026-07-04T17:12:34Z"},{"alias_kind":"pith_short_8","alias_value":"P3MOQIYJ","created_at":"2026-07-04T17:12:34Z"}],"graph_snapshots":[{"event_id":"sha256:2c4823ef4eab4c1bf0fa60e1b14a47e75ae3107c6d57cd19b06e3ddc6628ae77","target":"graph","created_at":"2026-07-04T17:12:34Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0809.0735/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A weakening of superconductivity upon substitution of Cu by Zn (0.5~1 %) is observed in a high-T_c cuprate, Ca_{2-x}Na_xCuO2Cl2, near the hole concentration of 1/8 per Cu. The superconducting transition temperature and its volume fraction, estimated by magnetic susceptibility, exhibit a sizable anomaly for x=0.12~0.14, where the slowing down of Cu spin fluctuations below 5 K is demonstrated by muon spin relaxation experiments. These observations are in close resemblance to other typical cuprates including YBa2Cu3O_{7-d}, and Bi2Sr2Ca_{1-x}Y_xCu2O_{8+d}, providing further evidence that Zn-induc","authors_text":"A. Koda, I. Yamada, K. H. Satoh, K. Oka, M. Azuma, M. Hiraishi, M. Miyazaki, M. Takano, R. Kadono, S. Takeshita, Y. Shimakawa","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-09-04T02:23:25Z","title":"Effect of Zn substitution for Cu on Ca$_{2-x}$Na$_{x}$CuO$_{2}$Cl$_{2}$ near the hole concentration of 1/8 per Cu"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.0735","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:a7bbd3d79d1079d18c83f71cf7788b99d62e8cf85cad50b1d2e219d4285dec0e","target":"record","created_at":"2026-07-04T17:12:34Z","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":"fe99e74d8135f18fd51d93774a0fc21c7863cc9e5e220461c24c84eadb3f2626","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-09-04T02:23:25Z","title_canon_sha256":"730b4e0f050bb1a9725847daff9a19d01be551b2ccad1b7c895f53bbb379d748"},"schema_version":"1.0","source":{"id":"0809.0735","kind":"arxiv","version":1}},"canonical_sha256":"7ed8e82309f4c7ee264164aca5774fe27fccb41a55857881f541091d5b736f80","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7ed8e82309f4c7ee264164aca5774fe27fccb41a55857881f541091d5b736f80","first_computed_at":"2026-07-04T17:12:34.593283Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:12:34.593283Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xuv2wKfWXW9mSWg/kbJwNOhhjjHnF0e3UHLMa5EAMy/9QXJoEtbwoN6RNWeFTpHlejv5KMw/zbnyWUVR5bBnCQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:12:34.593734Z","signed_message":"canonical_sha256_bytes"},"source_id":"0809.0735","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a7bbd3d79d1079d18c83f71cf7788b99d62e8cf85cad50b1d2e219d4285dec0e","sha256:2c4823ef4eab4c1bf0fa60e1b14a47e75ae3107c6d57cd19b06e3ddc6628ae77"],"state_sha256":"63ea5eef5a1a3d847a2b3d19e62c8dcfa8340d879e6a845967c3c81d51f39f6d"}