{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:4TEWSNYGPRU6SGNOS3EIZMIUJX","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":"1750dfb38a83cd30902ddcda7c33520fcb2ea3ba384040e42b8f3f2a8fb356dd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2011-07-28T19:08:47Z","title_canon_sha256":"f2e41fc0ef8c5eec352e86c53436e29600728b6860f382b2481d623535dfcdc7"},"schema_version":"1.0","source":{"id":"1107.5796","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.5796","created_at":"2026-05-18T02:01:06Z"},{"alias_kind":"arxiv_version","alias_value":"1107.5796v2","created_at":"2026-05-18T02:01:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.5796","created_at":"2026-05-18T02:01:06Z"},{"alias_kind":"pith_short_12","alias_value":"4TEWSNYGPRU6","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4TEWSNYGPRU6SGNO","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4TEWSNYG","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:8e45364a7fe23a13d862129ada56bf6c31dfa76576897383f583c74649e73bbf","target":"graph","created_at":"2026-05-18T02:01:06Z","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 identify a phase transition in the vortex system of a high-temperature superconductor with nano-columnar stacks of precipitates as strong vortex pinning centers. Above a particular, temperature-dependent field $B_X(T)$ the vortex response is no longer determined by the nano-columns, and is instead determined by point-like pinning. This phase transition leads to the change in the measured critical current density as a function of angle between the applied magnetic field and the nano-columns. Below the unbinding, there is a strong maximum in $J_C$ when field is aligned parallel to the columns","authors_text":"David K. Christen, Sung Hun Wee, Yuri L. Zuev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2011-07-28T19:08:47Z","title":"Transition from columnar to point pinning in coated conductors: critical currents, that are independent of magnetic field direction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.5796","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:dcb37ad5fc28d1f79259353891eb14a8fe6fdf19070833327b5b5ba26723b6c4","target":"record","created_at":"2026-05-18T02:01:06Z","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":"1750dfb38a83cd30902ddcda7c33520fcb2ea3ba384040e42b8f3f2a8fb356dd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2011-07-28T19:08:47Z","title_canon_sha256":"f2e41fc0ef8c5eec352e86c53436e29600728b6860f382b2481d623535dfcdc7"},"schema_version":"1.0","source":{"id":"1107.5796","kind":"arxiv","version":2}},"canonical_sha256":"e4c96937067c69e919ae96c88cb1144dd29639647d5a6233af1dccf0b9ce6200","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e4c96937067c69e919ae96c88cb1144dd29639647d5a6233af1dccf0b9ce6200","first_computed_at":"2026-05-18T02:01:06.183780Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:06.183780Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"h8Wpl0UCu12n/BK3APTlo4ukf063494r7tjtcBja7i9HeQDpxn66w194VJdxn01r78Ny/uv7fBul1VvlK24MDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:06.184290Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.5796","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dcb37ad5fc28d1f79259353891eb14a8fe6fdf19070833327b5b5ba26723b6c4","sha256:8e45364a7fe23a13d862129ada56bf6c31dfa76576897383f583c74649e73bbf"],"state_sha256":"aa1e93d9345a7f3be740bce560c5ef0d8cc00505ed4f0ff15c1bdbed27cc16c1"}