{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:K7OD7FU64LPJ2G5BBSZGFNWEXZ","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":"1ad76d8270f1df3a888a0959e57005c6eca4442751186ce2391eea450af8385c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-01-16T18:52:02Z","title_canon_sha256":"dcfd49371fecd09b002d50a12c70e32df5a31eb2995968c0f58e60ccb4322c37"},"schema_version":"1.0","source":{"id":"0901.2544","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.2544","created_at":"2026-05-18T02:14:57Z"},{"alias_kind":"arxiv_version","alias_value":"0901.2544v2","created_at":"2026-05-18T02:14:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.2544","created_at":"2026-05-18T02:14:57Z"},{"alias_kind":"pith_short_12","alias_value":"K7OD7FU64LPJ","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"K7OD7FU64LPJ2G5B","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"K7OD7FU6","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:9bedafcb66bb69a9ede5f7366b21a8088a41185ffaf5724883c9087eb8d7c00b","target":"graph","created_at":"2026-05-18T02:14:57Z","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 present the results of an experimental study of the nucleation of superconductivity at the surface of a single crystal YB$_6$ in a tilted dc magnetic field. A recently developed experimental technique allowed us to determine $H_{c3}$ at each side of the sample as a function of the angle between the dc magnetic field and the surface. Experiment shows that the ratio $H_{c3}/ H_{c2}\\approx 1.28 $ in the direction perpendicular to the surface dc field while according to the theory this ratio should be equal to 1. This sharp distinction cannot be ascribed to the surface roughness.","authors_text":"G.I. Leviev, M.I. Tsindlekht, N.Yu. Shitsevalova, V.M. Genkin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-01-16T18:52:02Z","title":"Surface superconducting states in yttrium hexaboride single crystal in a tilted magnetic field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.2544","kind":"arxiv","version":2},"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:f882fc33dd1ec16e1c798935406690645f0cc6a2df2d3ba6e29848262bfa155c","target":"record","created_at":"2026-05-18T02:14:57Z","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":"1ad76d8270f1df3a888a0959e57005c6eca4442751186ce2391eea450af8385c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-01-16T18:52:02Z","title_canon_sha256":"dcfd49371fecd09b002d50a12c70e32df5a31eb2995968c0f58e60ccb4322c37"},"schema_version":"1.0","source":{"id":"0901.2544","kind":"arxiv","version":2}},"canonical_sha256":"57dc3f969ee2de9d1ba10cb262b6c4be5ef86b9d7f7730f850c6a592d7badf7a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"57dc3f969ee2de9d1ba10cb262b6c4be5ef86b9d7f7730f850c6a592d7badf7a","first_computed_at":"2026-05-18T02:14:57.117228Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:14:57.117228Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"As5TkdsrBn80kzufdzi5OKuZRb7cDN7gLP+5423Y5el/Pk3l7jUzf9o9Nsr0ge+U2xIT9ofcQCK2e2WkeyQWCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:14:57.117834Z","signed_message":"canonical_sha256_bytes"},"source_id":"0901.2544","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f882fc33dd1ec16e1c798935406690645f0cc6a2df2d3ba6e29848262bfa155c","sha256:9bedafcb66bb69a9ede5f7366b21a8088a41185ffaf5724883c9087eb8d7c00b"],"state_sha256":"6ff9a00600e3e4a23fd9401159d5522baf1f531f5ba3a20ef4caeb4f4a2c7db7"}