{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:ZY7XTOBVTKSQCBRZX6NZTWY373","short_pith_number":"pith:ZY7XTOBV","schema_version":"1.0","canonical_sha256":"ce3f79b8359aa5010639bf9b99db1bfede10adaabffcc567ffa587c2a3805be5","source":{"kind":"arxiv","id":"1906.11535","version":3},"attestation_state":"computed","paper":{"title":"Structure of Superconducting Ca-intercalated Bilayer Graphene/SiC studied using Total-Reflection High-Energy Positron Diffraction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Takayama, I. Mochizuki, S. Hasegawa, T. Hyodo, Y. Endo, Y. Fukaya","submitted_at":"2019-06-27T10:19:57Z","abstract_excerpt":"We have investigated the atomic structure of superconducting Ca-intercalated bilayer graphene on a SiC(0001) substrate using total-reflection high-energy positron diffraction. By comparing the experimental rocking-curves with ones calculated for various structural models using a full-dynamical theory, we have found that Ca atoms are intercalated in the graphene-buffer interlayer, rather than between the two graphene layers. From transport measurements, the superconducting transition was observed to be at Tc_onset = 4K for this structure. This study is the first to clearly identify the relation"},"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":"1906.11535","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-27T10:19:57Z","cross_cats_sorted":[],"title_canon_sha256":"96cf9866365bb6184b7748509a85bb0d0a722fe5eb74a092fde2ff9cc7d929fd","abstract_canon_sha256":"922593df45cfc68f727089bfa4e23ee4675b36fc4b6ce657c161fdd355942f26"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:20:16.520051Z","signature_b64":"HJFApotgt6p+geJ+oiayo38Co4+WlgzaHpWsohgNaWNZYrUQyuldd8N1egw0c86+syCC3t7JKQ2IYax8mANlAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ce3f79b8359aa5010639bf9b99db1bfede10adaabffcc567ffa587c2a3805be5","last_reissued_at":"2026-07-05T00:20:16.519556Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:20:16.519556Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Structure of Superconducting Ca-intercalated Bilayer Graphene/SiC studied using Total-Reflection High-Energy Positron Diffraction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Takayama, I. Mochizuki, S. Hasegawa, T. Hyodo, Y. Endo, Y. Fukaya","submitted_at":"2019-06-27T10:19:57Z","abstract_excerpt":"We have investigated the atomic structure of superconducting Ca-intercalated bilayer graphene on a SiC(0001) substrate using total-reflection high-energy positron diffraction. By comparing the experimental rocking-curves with ones calculated for various structural models using a full-dynamical theory, we have found that Ca atoms are intercalated in the graphene-buffer interlayer, rather than between the two graphene layers. From transport measurements, the superconducting transition was observed to be at Tc_onset = 4K for this structure. This study is the first to clearly identify the relation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.11535","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/1906.11535/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":"1906.11535","created_at":"2026-07-05T00:20:16.519618+00:00"},{"alias_kind":"arxiv_version","alias_value":"1906.11535v3","created_at":"2026-07-05T00:20:16.519618+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.11535","created_at":"2026-07-05T00:20:16.519618+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZY7XTOBVTKSQ","created_at":"2026-07-05T00:20:16.519618+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZY7XTOBVTKSQCBRZ","created_at":"2026-07-05T00:20:16.519618+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZY7XTOBV","created_at":"2026-07-05T00:20:16.519618+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/ZY7XTOBVTKSQCBRZX6NZTWY373","json":"https://pith.science/pith/ZY7XTOBVTKSQCBRZX6NZTWY373.json","graph_json":"https://pith.science/api/pith-number/ZY7XTOBVTKSQCBRZX6NZTWY373/graph.json","events_json":"https://pith.science/api/pith-number/ZY7XTOBVTKSQCBRZX6NZTWY373/events.json","paper":"https://pith.science/paper/ZY7XTOBV"},"agent_actions":{"view_html":"https://pith.science/pith/ZY7XTOBVTKSQCBRZX6NZTWY373","download_json":"https://pith.science/pith/ZY7XTOBVTKSQCBRZX6NZTWY373.json","view_paper":"https://pith.science/paper/ZY7XTOBV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1906.11535&json=true","fetch_graph":"https://pith.science/api/pith-number/ZY7XTOBVTKSQCBRZX6NZTWY373/graph.json","fetch_events":"https://pith.science/api/pith-number/ZY7XTOBVTKSQCBRZX6NZTWY373/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZY7XTOBVTKSQCBRZX6NZTWY373/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZY7XTOBVTKSQCBRZX6NZTWY373/action/storage_attestation","attest_author":"https://pith.science/pith/ZY7XTOBVTKSQCBRZX6NZTWY373/action/author_attestation","sign_citation":"https://pith.science/pith/ZY7XTOBVTKSQCBRZX6NZTWY373/action/citation_signature","submit_replication":"https://pith.science/pith/ZY7XTOBVTKSQCBRZX6NZTWY373/action/replication_record"}},"created_at":"2026-07-05T00:20:16.519618+00:00","updated_at":"2026-07-05T00:20:16.519618+00:00"}