{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2001:BHRATQMYY4XVTOQQNL2IS3FB3J","short_pith_number":"pith:BHRATQMY","schema_version":"1.0","canonical_sha256":"09e209c198c72f59ba106af4896ca1da644035e2df84e3cb42db84d5136c5be4","source":{"kind":"arxiv","id":"cond-mat/0104574","version":3},"attestation_state":"computed","paper":{"title":"Order parameter of MgB_2: a fully gapped superconductor","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"C. J. Liu, C.-Q. Jin, F. H. Hsu, H. D. Yang, H. H. Li, J.-Y. Lin, R.-C. Yu, S.-C. Li","submitted_at":"2001-04-30T11:37:27Z","abstract_excerpt":"We have measured the low-temperature specific heat C(T) for polycrystalline MgB_2 prepared by high pressure synthesis. C(T) below 10 K vanishes exponentially, which unambiguously indicates a fully opened superconducting energy gap. However, this gap is found to be too small to account for Tc of MgB_2. Together with the small specific heat jump DeltaC/gamma_nTc=1.13, scenarios like anisotropic s-wave or multi-component order parameter are called for. The magnetic field dependence of gamma(H) is neither linear for a fully gapped s-wave superconductor nor H^1/2 for nodal order parameter. It seems"},"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/0104574","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2001-04-30T11:37:27Z","cross_cats_sorted":[],"title_canon_sha256":"27c0f2861cfbcd43b28edcc2dadbb81e94cec05a6f6d1cd0fb9170ee4a17e2e9","abstract_canon_sha256":"e9024159801a266a2fc93e9179f13d28c7fbb1d9eb1a4567a9e2a159e5d7f545"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:25:29.184151Z","signature_b64":"Ejj/hmdSEoo3hXKLzFR0qr9fhu3Cdh+Yle51RUgonTspGHaujR91l3kr3tdWCJZ7JNJSyMSnsgvflCcB4RAPAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"09e209c198c72f59ba106af4896ca1da644035e2df84e3cb42db84d5136c5be4","last_reissued_at":"2026-07-04T16:25:29.183748Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:25:29.183748Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Order parameter of MgB_2: a fully gapped superconductor","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"C. J. Liu, C.-Q. Jin, F. H. Hsu, H. D. Yang, H. H. Li, J.-Y. Lin, R.-C. Yu, S.-C. Li","submitted_at":"2001-04-30T11:37:27Z","abstract_excerpt":"We have measured the low-temperature specific heat C(T) for polycrystalline MgB_2 prepared by high pressure synthesis. C(T) below 10 K vanishes exponentially, which unambiguously indicates a fully opened superconducting energy gap. However, this gap is found to be too small to account for Tc of MgB_2. Together with the small specific heat jump DeltaC/gamma_nTc=1.13, scenarios like anisotropic s-wave or multi-component order parameter are called for. The magnetic field dependence of gamma(H) is neither linear for a fully gapped s-wave superconductor nor H^1/2 for nodal order parameter. It seems"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0104574","kind":"arxiv","version":3},"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/0104574/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/0104574","created_at":"2026-07-04T16:25:29.183805+00:00"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0104574v3","created_at":"2026-07-04T16:25:29.183805+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0104574","created_at":"2026-07-04T16:25:29.183805+00:00"},{"alias_kind":"pith_short_12","alias_value":"BHRATQMYY4XV","created_at":"2026-07-04T16:25:29.183805+00:00"},{"alias_kind":"pith_short_16","alias_value":"BHRATQMYY4XVTOQQ","created_at":"2026-07-04T16:25:29.183805+00:00"},{"alias_kind":"pith_short_8","alias_value":"BHRATQMY","created_at":"2026-07-04T16:25:29.183805+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/BHRATQMYY4XVTOQQNL2IS3FB3J","json":"https://pith.science/pith/BHRATQMYY4XVTOQQNL2IS3FB3J.json","graph_json":"https://pith.science/api/pith-number/BHRATQMYY4XVTOQQNL2IS3FB3J/graph.json","events_json":"https://pith.science/api/pith-number/BHRATQMYY4XVTOQQNL2IS3FB3J/events.json","paper":"https://pith.science/paper/BHRATQMY"},"agent_actions":{"view_html":"https://pith.science/pith/BHRATQMYY4XVTOQQNL2IS3FB3J","download_json":"https://pith.science/pith/BHRATQMYY4XVTOQQNL2IS3FB3J.json","view_paper":"https://pith.science/paper/BHRATQMY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=cond-mat/0104574&json=true","fetch_graph":"https://pith.science/api/pith-number/BHRATQMYY4XVTOQQNL2IS3FB3J/graph.json","fetch_events":"https://pith.science/api/pith-number/BHRATQMYY4XVTOQQNL2IS3FB3J/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/BHRATQMYY4XVTOQQNL2IS3FB3J/action/timestamp_anchor","attest_storage":"https://pith.science/pith/BHRATQMYY4XVTOQQNL2IS3FB3J/action/storage_attestation","attest_author":"https://pith.science/pith/BHRATQMYY4XVTOQQNL2IS3FB3J/action/author_attestation","sign_citation":"https://pith.science/pith/BHRATQMYY4XVTOQQNL2IS3FB3J/action/citation_signature","submit_replication":"https://pith.science/pith/BHRATQMYY4XVTOQQNL2IS3FB3J/action/replication_record"}},"created_at":"2026-07-04T16:25:29.183805+00:00","updated_at":"2026-07-04T16:25:29.183805+00:00"}