{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:TVQU5M6MINQM46C6OJQP2MCPEG","short_pith_number":"pith:TVQU5M6M","schema_version":"1.0","canonical_sha256":"9d614eb3cc4360ce785e7260fd304f218c533e6ea7aeb373c6b954ca420f49b2","source":{"kind":"arxiv","id":"cond-mat/0305503","version":2},"attestation_state":"computed","paper":{"title":"Superconductivity in a layered cobalt oxyhydrate Na$_{0.31}$CoO$_{2}\\cdot$1.3H$_{2}$O","license":"","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Chunmu Feng, Guanghan Cao, Jingqin Shen, Minghu Fang, Wen Lu, Yi Xu, Zhu'an Xu","submitted_at":"2003-05-21T17:21:39Z","abstract_excerpt":"We report the electrical, magnetic and thermal measurements on a layered cobalt oxyhydrate Na$_{0.31}$CoO$_{2}\\cdot$1.3H$_{2}$O. Bulk superconductivity at 4.3 K has been confirmed, however, the measured superconducting fraction is relatively low probably due to the sample's intrinsic two-dimensional characteristic. The compound exhibits weak-coupled and extreme type-II superconductivity with the average energy gap $\\Delta_{a}(0)$ and the Ginzburg-Landau parameter $\\kappa$ of $\\sim$ 0.50 meV and $\\sim$ 140, respectively. The normalized electronic specific heat data in the superconducting state "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"cond-mat/0305503","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-05-21T17:21:39Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"369dd196c56557d4f83d65a63ac4595be16aa5c9546b286793c788bf5d79d2bc","abstract_canon_sha256":"756fc0ed65db5e2a5f982438dacebbbf6b0d770147d89bec974af3f0f35b3e3b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:38:49.841688Z","signature_b64":"AGLPrULLZm6sjSa0i/PirWD7pRv6X2jKnmEl+HYmItWwZE/iQftVB/6X+EAjWPCBpuzwZQOk4XlmwGkkn4hwAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d614eb3cc4360ce785e7260fd304f218c533e6ea7aeb373c6b954ca420f49b2","last_reissued_at":"2026-07-04T16:38:49.841286Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:38:49.841286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Superconductivity in a layered cobalt oxyhydrate Na$_{0.31}$CoO$_{2}\\cdot$1.3H$_{2}$O","license":"","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Chunmu Feng, Guanghan Cao, Jingqin Shen, Minghu Fang, Wen Lu, Yi Xu, Zhu'an Xu","submitted_at":"2003-05-21T17:21:39Z","abstract_excerpt":"We report the electrical, magnetic and thermal measurements on a layered cobalt oxyhydrate Na$_{0.31}$CoO$_{2}\\cdot$1.3H$_{2}$O. Bulk superconductivity at 4.3 K has been confirmed, however, the measured superconducting fraction is relatively low probably due to the sample's intrinsic two-dimensional characteristic. The compound exhibits weak-coupled and extreme type-II superconductivity with the average energy gap $\\Delta_{a}(0)$ and the Ginzburg-Landau parameter $\\kappa$ of $\\sim$ 0.50 meV and $\\sim$ 140, respectively. The normalized electronic specific heat data in the superconducting state "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0305503","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/cond-mat/0305503/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0305503","created_at":"2026-07-04T16:38:49.841355+00:00"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0305503v2","created_at":"2026-07-04T16:38:49.841355+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0305503","created_at":"2026-07-04T16:38:49.841355+00:00"},{"alias_kind":"pith_short_12","alias_value":"TVQU5M6MINQM","created_at":"2026-07-04T16:38:49.841355+00:00"},{"alias_kind":"pith_short_16","alias_value":"TVQU5M6MINQM46C6","created_at":"2026-07-04T16:38:49.841355+00:00"},{"alias_kind":"pith_short_8","alias_value":"TVQU5M6M","created_at":"2026-07-04T16:38:49.841355+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/TVQU5M6MINQM46C6OJQP2MCPEG","json":"https://pith.science/pith/TVQU5M6MINQM46C6OJQP2MCPEG.json","graph_json":"https://pith.science/api/pith-number/TVQU5M6MINQM46C6OJQP2MCPEG/graph.json","events_json":"https://pith.science/api/pith-number/TVQU5M6MINQM46C6OJQP2MCPEG/events.json","paper":"https://pith.science/paper/TVQU5M6M"},"agent_actions":{"view_html":"https://pith.science/pith/TVQU5M6MINQM46C6OJQP2MCPEG","download_json":"https://pith.science/pith/TVQU5M6MINQM46C6OJQP2MCPEG.json","view_paper":"https://pith.science/paper/TVQU5M6M","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=cond-mat/0305503&json=true","fetch_graph":"https://pith.science/api/pith-number/TVQU5M6MINQM46C6OJQP2MCPEG/graph.json","fetch_events":"https://pith.science/api/pith-number/TVQU5M6MINQM46C6OJQP2MCPEG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TVQU5M6MINQM46C6OJQP2MCPEG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TVQU5M6MINQM46C6OJQP2MCPEG/action/storage_attestation","attest_author":"https://pith.science/pith/TVQU5M6MINQM46C6OJQP2MCPEG/action/author_attestation","sign_citation":"https://pith.science/pith/TVQU5M6MINQM46C6OJQP2MCPEG/action/citation_signature","submit_replication":"https://pith.science/pith/TVQU5M6MINQM46C6OJQP2MCPEG/action/replication_record"}},"created_at":"2026-07-04T16:38:49.841355+00:00","updated_at":"2026-07-04T16:38:49.841355+00:00"}