{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:Y5W6HMLHBXCHSEOGHE2MUQ3CPD","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":"b4f790e679a7b5ca6566a59de40d6a02a457e58e93c596f8be8e8e06d48d8634","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2011-02-18T16:02:08Z","title_canon_sha256":"86acdf2378a68026a948d3b1d5699906dfafcbf04a83e0e5a187991616dc61da"},"schema_version":"1.0","source":{"id":"1102.3864","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.3864","created_at":"2026-05-18T03:20:06Z"},{"alias_kind":"arxiv_version","alias_value":"1102.3864v1","created_at":"2026-05-18T03:20:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.3864","created_at":"2026-05-18T03:20:06Z"},{"alias_kind":"pith_short_12","alias_value":"Y5W6HMLHBXCH","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"Y5W6HMLHBXCHSEOG","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"Y5W6HMLH","created_at":"2026-05-18T12:26:47Z"}],"graph_snapshots":[{"event_id":"sha256:86ae75b4519c96c6030e48f620e4226cc2b84d15bf551aae3338335803ad53cf","target":"graph","created_at":"2026-05-18T03:20:06Z","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":"The isotope coefficient $\\beta$ of the magnetic penetration depth in the superconducting state is studied at T=0 for a $d$-CDW and a nodal metal model. Disregarding superconductivity the Fermi surface of the first model possesses arcs whereas the second model has no arcs. We show that a large increase of $\\beta$ in the pseudogap region is generically incompatible with Fermi arcs in the pseudogap state. Thus only the second model shows a large increase of $\\beta$ with decreasing doping. The required electron-phonon coupling is small and compatible with first-principles calculations based on the","authors_text":"Andr\\'es Greco, Roland Zeyher","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2011-02-18T16:02:08Z","title":"Fermi arcs and isotope effect of the magnetic penetration depth in underdoped cuprates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.3864","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":"sha256:853b33e4516ecebc6f17e4f521e9b6e922f2b18fff1877e494db34e7cdd486b2","target":"record","created_at":"2026-05-18T03:20:06Z","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":"b4f790e679a7b5ca6566a59de40d6a02a457e58e93c596f8be8e8e06d48d8634","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2011-02-18T16:02:08Z","title_canon_sha256":"86acdf2378a68026a948d3b1d5699906dfafcbf04a83e0e5a187991616dc61da"},"schema_version":"1.0","source":{"id":"1102.3864","kind":"arxiv","version":1}},"canonical_sha256":"c76de3b1670dc47911c63934ca436278c3fbf69a106876354839b55532fb4adb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c76de3b1670dc47911c63934ca436278c3fbf69a106876354839b55532fb4adb","first_computed_at":"2026-05-18T03:20:06.843027Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:20:06.843027Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ISXeyvzdeykG/vDIwhtGbTvkfAhIQ6qjYVAjdDT3sUpBykPl3VNgH9D2pW3qDNe4NpTWqfBxRX/yJWsxuSc8DA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:20:06.843720Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.3864","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:853b33e4516ecebc6f17e4f521e9b6e922f2b18fff1877e494db34e7cdd486b2","sha256:86ae75b4519c96c6030e48f620e4226cc2b84d15bf551aae3338335803ad53cf"],"state_sha256":"ee60bfd960e6272d4d583a0396686436934477cfdf8dcbfa166050b743845cf2"}