{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1996:XUR7J3LRE2HHCG763BU6FBQT4E","short_pith_number":"pith:XUR7J3LR","schema_version":"1.0","canonical_sha256":"bd23f4ed71268e711bfed869e28613e10b609bd0ed47426e32c79a9013e2d67a","source":{"kind":"arxiv","id":"cond-mat/9611194","version":1},"attestation_state":"computed","paper":{"title":"Evolution of the Fermi surface with carrier concentration in Bi_2Sr_2CaCu_2O_{8+\\delta}","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"H. Ding, J. C. Campuzano, K. Kadowaki, M. Randeria, M. R. Norman, T. Mochiku, T. Takahashi, T. Takeuchi, T. Yokoya","submitted_at":"1996-11-25T16:12:03Z","abstract_excerpt":"We show, by use of angle-resolved photoemission spectroscopy, that underdoped Bi_2Sr_2CaCu_2O_{8+\\delta} appears to have a large Fermi surface centered at (\\pi,\\pi), even for samples with a T_c as low as 15 K. No clear evidence of a Fermi surface pocket around (\\pi/2,\\pi/2) has been found. These conclusions are based on a determination of the minimum gap locus in the pseudogap regime T_c < T < T^*, which is found to coincide with the locus of gapless excitations in momentum space (Fermi surface) determined above T^*. These results suggest that the pseudogap is more likely of precursor pairing "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"cond-mat/9611194","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"1996-11-25T16:12:03Z","cross_cats_sorted":[],"title_canon_sha256":"62c988523409c155da197e3e655d05a716abf1264fedfd129559bb6792cf1002","abstract_canon_sha256":"acae70bda200f30c7a26a230f5644f269a7de9360a32613e98e264c0e507163a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:01:04.392616Z","signature_b64":"07F5d/1NwZhxuIxX+NJD8qCSjMW1pdTcbEEuIkIqEBCnKrJzx3M1XaYeczlJRakqnISyFZB2QWjn4BAzjGgvCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd23f4ed71268e711bfed869e28613e10b609bd0ed47426e32c79a9013e2d67a","last_reissued_at":"2026-07-04T16:01:04.392208Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:01:04.392208Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Evolution of the Fermi surface with carrier concentration in Bi_2Sr_2CaCu_2O_{8+\\delta}","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"H. Ding, J. C. Campuzano, K. Kadowaki, M. Randeria, M. R. Norman, T. Mochiku, T. Takahashi, T. Takeuchi, T. Yokoya","submitted_at":"1996-11-25T16:12:03Z","abstract_excerpt":"We show, by use of angle-resolved photoemission spectroscopy, that underdoped Bi_2Sr_2CaCu_2O_{8+\\delta} appears to have a large Fermi surface centered at (\\pi,\\pi), even for samples with a T_c as low as 15 K. No clear evidence of a Fermi surface pocket around (\\pi/2,\\pi/2) has been found. These conclusions are based on a determination of the minimum gap locus in the pseudogap regime T_c < T < T^*, which is found to coincide with the locus of gapless excitations in momentum space (Fermi surface) determined above T^*. These results suggest that the pseudogap is more likely of precursor pairing "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9611194","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/cond-mat/9611194/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9611194","created_at":"2026-07-04T16:01:04.392268+00:00"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9611194v1","created_at":"2026-07-04T16:01:04.392268+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9611194","created_at":"2026-07-04T16:01:04.392268+00:00"},{"alias_kind":"pith_short_12","alias_value":"XUR7J3LRE2HH","created_at":"2026-07-04T16:01:04.392268+00:00"},{"alias_kind":"pith_short_16","alias_value":"XUR7J3LRE2HHCG76","created_at":"2026-07-04T16:01:04.392268+00:00"},{"alias_kind":"pith_short_8","alias_value":"XUR7J3LR","created_at":"2026-07-04T16:01:04.392268+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/XUR7J3LRE2HHCG763BU6FBQT4E","json":"https://pith.science/pith/XUR7J3LRE2HHCG763BU6FBQT4E.json","graph_json":"https://pith.science/api/pith-number/XUR7J3LRE2HHCG763BU6FBQT4E/graph.json","events_json":"https://pith.science/api/pith-number/XUR7J3LRE2HHCG763BU6FBQT4E/events.json","paper":"https://pith.science/paper/XUR7J3LR"},"agent_actions":{"view_html":"https://pith.science/pith/XUR7J3LRE2HHCG763BU6FBQT4E","download_json":"https://pith.science/pith/XUR7J3LRE2HHCG763BU6FBQT4E.json","view_paper":"https://pith.science/paper/XUR7J3LR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=cond-mat/9611194&json=true","fetch_graph":"https://pith.science/api/pith-number/XUR7J3LRE2HHCG763BU6FBQT4E/graph.json","fetch_events":"https://pith.science/api/pith-number/XUR7J3LRE2HHCG763BU6FBQT4E/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/XUR7J3LRE2HHCG763BU6FBQT4E/action/timestamp_anchor","attest_storage":"https://pith.science/pith/XUR7J3LRE2HHCG763BU6FBQT4E/action/storage_attestation","attest_author":"https://pith.science/pith/XUR7J3LRE2HHCG763BU6FBQT4E/action/author_attestation","sign_citation":"https://pith.science/pith/XUR7J3LRE2HHCG763BU6FBQT4E/action/citation_signature","submit_replication":"https://pith.science/pith/XUR7J3LRE2HHCG763BU6FBQT4E/action/replication_record"}},"created_at":"2026-07-04T16:01:04.392268+00:00","updated_at":"2026-07-04T16:01:04.392268+00:00"}