{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:NPZ33X36QBOPWOX2O2C45SP27R","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":"65f095a738789665bfe670bc74decab16cf4c77516c2e5fbe4dbbd4ca46884a1","cross_cats_sorted":["cond-mat.str-el"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2020-12-07T09:59:46Z","title_canon_sha256":"ca092f1ebbb9e89132814816ebc7500778dc20ff030621853aed7c8638957f7d"},"schema_version":"1.0","source":{"id":"2012.03559","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.03559","created_at":"2026-07-05T01:57:31Z"},{"alias_kind":"arxiv_version","alias_value":"2012.03559v1","created_at":"2026-07-05T01:57:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.03559","created_at":"2026-07-05T01:57:31Z"},{"alias_kind":"pith_short_12","alias_value":"NPZ33X36QBOP","created_at":"2026-07-05T01:57:31Z"},{"alias_kind":"pith_short_16","alias_value":"NPZ33X36QBOPWOX2","created_at":"2026-07-05T01:57:31Z"},{"alias_kind":"pith_short_8","alias_value":"NPZ33X36","created_at":"2026-07-05T01:57:31Z"}],"graph_snapshots":[{"event_id":"sha256:034023bdeadc8a16d743f7d655203565e29df3e57bc01a2de369d9290ddba201","target":"graph","created_at":"2026-07-05T01:57:31Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2012.03559/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The temperature dependence of the superfluid density $\\rho_s(T)$ has been measured for a series of ultrathin MBE-grown DyBa$_2$Cu$_3$O$_{7-\\delta}$ superconducting (SC) films by sub-mm wave interferometry combined with time-domain THz spectroscopy and IR ellipsometry. We find that all films 10 u.c. and thicker show the same universal temperature dependence of $\\rho_s(T)$, which follows the critical behavior characteristic of single crystal YBa$_2$Cu$_3$O$_{7-\\delta}$ as $T$ approaches $T_c$. In 7 u.c. thick films, $\\rho_s(T)$ declines steeply upon approaching $T_c$, as expected for the Berezin","authors_text":"A. V. Boris, B. Keimer, D. Putzky, G. Christiani, G. Logvenov, K. S. Rabinovich, R. D. Dawson","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2020-12-07T09:59:46Z","title":"Approaching two-dimensional superconductivity in ultrathin DyBa$_2$Cu$_3$O$_{7-\\delta}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.03559","kind":"arxiv","version":1},"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":"sha256:3604280c939894dbe286bc655bd3622b049d06a8df0a8415324647ff3f7566f3","target":"record","created_at":"2026-07-05T01:57:31Z","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":"65f095a738789665bfe670bc74decab16cf4c77516c2e5fbe4dbbd4ca46884a1","cross_cats_sorted":["cond-mat.str-el"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2020-12-07T09:59:46Z","title_canon_sha256":"ca092f1ebbb9e89132814816ebc7500778dc20ff030621853aed7c8638957f7d"},"schema_version":"1.0","source":{"id":"2012.03559","kind":"arxiv","version":1}},"canonical_sha256":"6bf3bddf7e805cfb3afa7685cec9fafc65efb42dac8efb20b1e50fa0592578f1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6bf3bddf7e805cfb3afa7685cec9fafc65efb42dac8efb20b1e50fa0592578f1","first_computed_at":"2026-07-05T01:57:31.088686Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:57:31.088686Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Xbkqk8bWyr8lZOu989xMc9LXAoBcTh9pdewu6cpylokS+Lkv8vWCb0DOq6NEMfVO1NTH7wpanfNyoSsDOOpvCA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:57:31.089233Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.03559","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3604280c939894dbe286bc655bd3622b049d06a8df0a8415324647ff3f7566f3","sha256:034023bdeadc8a16d743f7d655203565e29df3e57bc01a2de369d9290ddba201"],"state_sha256":"cb82bfb9de2b193085adfb8beef45d606e66e0cd0bf1531337e6419328bb5c66"}