{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:SUH2HT6ONDDOGJ4RWXINEYQGUN","short_pith_number":"pith:SUH2HT6O","canonical_record":{"source":{"id":"1303.3856","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-03-15T18:47:31Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"354dcd4bb62c74c4f76cc00e50b6541e4af62232f79d4f534c8d0910600327f1","abstract_canon_sha256":"d209284df2273d5303431f2b09aa5483a363f730107711378aba088deeded576"},"schema_version":"1.0"},"canonical_sha256":"950fa3cfce68c6e32791b5d0d26206a36de9bd482a19069cfd703aaf5dfa9703","source":{"kind":"arxiv","id":"1303.3856","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.3856","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"arxiv_version","alias_value":"1303.3856v2","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.3856","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"pith_short_12","alias_value":"SUH2HT6ONDDO","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SUH2HT6ONDDOGJ4R","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SUH2HT6O","created_at":"2026-05-18T12:27:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:SUH2HT6ONDDOGJ4RWXINEYQGUN","target":"record","payload":{"canonical_record":{"source":{"id":"1303.3856","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-03-15T18:47:31Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"354dcd4bb62c74c4f76cc00e50b6541e4af62232f79d4f534c8d0910600327f1","abstract_canon_sha256":"d209284df2273d5303431f2b09aa5483a363f730107711378aba088deeded576"},"schema_version":"1.0"},"canonical_sha256":"950fa3cfce68c6e32791b5d0d26206a36de9bd482a19069cfd703aaf5dfa9703","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:58:23.635390Z","signature_b64":"nmRyMb3cSRWeiAjvC/VGStgKR+xKIzTpPMIP8u7QO/IBbd6AXjMOvzFt4qKeCo5pxQSixaltIMdA2RqN77H2Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"950fa3cfce68c6e32791b5d0d26206a36de9bd482a19069cfd703aaf5dfa9703","last_reissued_at":"2026-05-18T02:58:23.634864Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:58:23.634864Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.3856","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:58:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"npYBL1h8Xhp1Fc7O7D2wQ8Qgpx+/DUW+V48qUeDVU3GG0F2QOtb/kFG68A775WLLGHoT4IQWuf2kL1mMEVVdDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T15:49:53.131060Z"},"content_sha256":"7148c5ccaec5ffb0993ce7903693f1da9ab652de9b065bc164992d65ee40e34c","schema_version":"1.0","event_id":"sha256:7148c5ccaec5ffb0993ce7903693f1da9ab652de9b065bc164992d65ee40e34c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:SUH2HT6ONDDOGJ4RWXINEYQGUN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct measurement of the upper critical field in a cuprate superconductor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"A. Juneau-Fecteau, B. J. Ramshaw, B. Vignolle, C. Proust, D. A. Bonn, D. Graf, D. LeBoeuf, F. Laliberte, G. Grissonnanche, J. Chang, J.-H. Park, Louis Taillefer, M.-E. Delage, M. Sutherland, N. Doiron-Leyraud, N. E. Hussey, O. Cyr-Choiniere, R. Liang, S. Adachi, S. Dufour-Beausejour, S. Kramer, S. Rene de Cotret, W. N. Hardy","submitted_at":"2013-03-15T18:47:31Z","abstract_excerpt":"The upper critical field Hc2 is a fundamental measure of the pairing strength, yet there is no agreement on its magnitude and doping dependence in cuprate superconductors. We have used thermal conductivity as a direct probe of Hc2 in the cuprates YBa2Cu3Oy and YBa2Cu4O8 to show that there is no vortex liquid at T = 0, allowing us to use high-field resistivity measurements to map out the doping dependence of Hc2 across the phase diagram. Hc2(p) exhibits two peaks, each located at a critical point where the Fermi surface undergoes a transformation. The condensation energy obtained directly from "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.3856","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:58:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YEcjyIalFjfDqcAgqTvqIfZTHpquL31Uuf/11LQji4ctbWZnJ5ZjjPPy6XwvR3SjFgZ9Nt51l1o8qA8yZmtsCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T15:49:53.131451Z"},"content_sha256":"ddc385e49dbcc52fd18ab825c8fefa10747b2d53d62cc1adec76f01b159e73a3","schema_version":"1.0","event_id":"sha256:ddc385e49dbcc52fd18ab825c8fefa10747b2d53d62cc1adec76f01b159e73a3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SUH2HT6ONDDOGJ4RWXINEYQGUN/bundle.json","state_url":"https://pith.science/pith/SUH2HT6ONDDOGJ4RWXINEYQGUN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SUH2HT6ONDDOGJ4RWXINEYQGUN/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T15:49:53Z","links":{"resolver":"https://pith.science/pith/SUH2HT6ONDDOGJ4RWXINEYQGUN","bundle":"https://pith.science/pith/SUH2HT6ONDDOGJ4RWXINEYQGUN/bundle.json","state":"https://pith.science/pith/SUH2HT6ONDDOGJ4RWXINEYQGUN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SUH2HT6ONDDOGJ4RWXINEYQGUN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:SUH2HT6ONDDOGJ4RWXINEYQGUN","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":"d209284df2273d5303431f2b09aa5483a363f730107711378aba088deeded576","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-03-15T18:47:31Z","title_canon_sha256":"354dcd4bb62c74c4f76cc00e50b6541e4af62232f79d4f534c8d0910600327f1"},"schema_version":"1.0","source":{"id":"1303.3856","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.3856","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"arxiv_version","alias_value":"1303.3856v2","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.3856","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"pith_short_12","alias_value":"SUH2HT6ONDDO","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SUH2HT6ONDDOGJ4R","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SUH2HT6O","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:ddc385e49dbcc52fd18ab825c8fefa10747b2d53d62cc1adec76f01b159e73a3","target":"graph","created_at":"2026-05-18T02:58:23Z","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":"The upper critical field Hc2 is a fundamental measure of the pairing strength, yet there is no agreement on its magnitude and doping dependence in cuprate superconductors. We have used thermal conductivity as a direct probe of Hc2 in the cuprates YBa2Cu3Oy and YBa2Cu4O8 to show that there is no vortex liquid at T = 0, allowing us to use high-field resistivity measurements to map out the doping dependence of Hc2 across the phase diagram. Hc2(p) exhibits two peaks, each located at a critical point where the Fermi surface undergoes a transformation. The condensation energy obtained directly from ","authors_text":"A. Juneau-Fecteau, B. J. Ramshaw, B. Vignolle, C. Proust, D. A. Bonn, D. Graf, D. LeBoeuf, F. Laliberte, G. Grissonnanche, J. Chang, J.-H. Park, Louis Taillefer, M.-E. Delage, M. Sutherland, N. Doiron-Leyraud, N. E. Hussey, O. Cyr-Choiniere, R. Liang, S. Adachi, S. Dufour-Beausejour, S. Kramer, S. Rene de Cotret, W. N. Hardy","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-03-15T18:47:31Z","title":"Direct measurement of the upper critical field in a cuprate superconductor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.3856","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":"sha256:7148c5ccaec5ffb0993ce7903693f1da9ab652de9b065bc164992d65ee40e34c","target":"record","created_at":"2026-05-18T02:58:23Z","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":"d209284df2273d5303431f2b09aa5483a363f730107711378aba088deeded576","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2013-03-15T18:47:31Z","title_canon_sha256":"354dcd4bb62c74c4f76cc00e50b6541e4af62232f79d4f534c8d0910600327f1"},"schema_version":"1.0","source":{"id":"1303.3856","kind":"arxiv","version":2}},"canonical_sha256":"950fa3cfce68c6e32791b5d0d26206a36de9bd482a19069cfd703aaf5dfa9703","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"950fa3cfce68c6e32791b5d0d26206a36de9bd482a19069cfd703aaf5dfa9703","first_computed_at":"2026-05-18T02:58:23.634864Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:58:23.634864Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nmRyMb3cSRWeiAjvC/VGStgKR+xKIzTpPMIP8u7QO/IBbd6AXjMOvzFt4qKeCo5pxQSixaltIMdA2RqN77H2Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:58:23.635390Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.3856","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7148c5ccaec5ffb0993ce7903693f1da9ab652de9b065bc164992d65ee40e34c","sha256:ddc385e49dbcc52fd18ab825c8fefa10747b2d53d62cc1adec76f01b159e73a3"],"state_sha256":"e5e980f2eafd693819a65dec5fa793429649a829af7264ab1976366f7dd04acc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3p68ni/vLFQBO22xR6ae7rJ+5X06RDM+ouyPSrsOxq34zFIcnao/MCMPTqTJLCBxEbQxx0+J/P2b+1T0vjcIAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T15:49:53.133601Z","bundle_sha256":"9ee2919151384535ec22b1dba6bfcbfde24625d78e76c91c1a5dd4ca7e4e0486"}}