{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1997:6I6IHGG4VU2YCWZLKGQNTDL6OD","short_pith_number":"pith:6I6IHGG4","schema_version":"1.0","canonical_sha256":"f23c8398dcad35815b2b51a0d98d7e70d43739836c07a8a1c77f4eff48286eab","source":{"kind":"arxiv","id":"cond-mat/9702209","version":2},"attestation_state":"computed","paper":{"title":"The Fermi surface of underdoped high-T_c superconducting cuprates","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Lu Yu, Xi Dai, Zhao-Bin Su","submitted_at":"1997-02-24T04:50:05Z","abstract_excerpt":"The coexistence of $\\pi$-flux state and d-wave RVB state is considered in this paper within the slave boson approach. A critical value of doping concentration $\\delta_c$ is found, below which the coexisting $\\pi$-flux and d-wave RVB state is favored in energy. The pseudo Fermi surface of spinons and the physical electron spectral function are calculated. A clear Fermi-level crossing is found along the (0,0) to ($\\pi$, $\\pi$) direction, but no such crossing is detected along the ($\\pi$, 0) to ($\\pi$, $\\pi$) direction. Also, an energy gap of d-wave symmetry appears at the Fermi level in our calc"},"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/9702209","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-02-24T04:50:05Z","cross_cats_sorted":[],"title_canon_sha256":"0f1d098515604cc7f72d1176fab76c204151a07cb99d39b23fbdce8c0df72a91","abstract_canon_sha256":"4a67dad75648e41b1c69d526001d2acb8f2471d969d5135b923551714ffd3a6b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:03:42.890080Z","signature_b64":"s93rYcBvzlYgxu2Ide4iX1xEwtwBKSu45NHhMhkKDhYUVYyn9Z/l0C1J/UlsVerSleOjJM4FnH1eugJzZOAuAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f23c8398dcad35815b2b51a0d98d7e70d43739836c07a8a1c77f4eff48286eab","last_reissued_at":"2026-07-04T16:03:42.889744Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:03:42.889744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Fermi surface of underdoped high-T_c superconducting cuprates","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Lu Yu, Xi Dai, Zhao-Bin Su","submitted_at":"1997-02-24T04:50:05Z","abstract_excerpt":"The coexistence of $\\pi$-flux state and d-wave RVB state is considered in this paper within the slave boson approach. A critical value of doping concentration $\\delta_c$ is found, below which the coexisting $\\pi$-flux and d-wave RVB state is favored in energy. The pseudo Fermi surface of spinons and the physical electron spectral function are calculated. A clear Fermi-level crossing is found along the (0,0) to ($\\pi$, $\\pi$) direction, but no such crossing is detected along the ($\\pi$, 0) to ($\\pi$, $\\pi$) direction. Also, an energy gap of d-wave symmetry appears at the Fermi level in our calc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9702209","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/cond-mat/9702209/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/9702209","created_at":"2026-07-04T16:03:42.889799+00:00"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9702209v2","created_at":"2026-07-04T16:03:42.889799+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9702209","created_at":"2026-07-04T16:03:42.889799+00:00"},{"alias_kind":"pith_short_12","alias_value":"6I6IHGG4VU2Y","created_at":"2026-07-04T16:03:42.889799+00:00"},{"alias_kind":"pith_short_16","alias_value":"6I6IHGG4VU2YCWZL","created_at":"2026-07-04T16:03:42.889799+00:00"},{"alias_kind":"pith_short_8","alias_value":"6I6IHGG4","created_at":"2026-07-04T16:03:42.889799+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/6I6IHGG4VU2YCWZLKGQNTDL6OD","json":"https://pith.science/pith/6I6IHGG4VU2YCWZLKGQNTDL6OD.json","graph_json":"https://pith.science/api/pith-number/6I6IHGG4VU2YCWZLKGQNTDL6OD/graph.json","events_json":"https://pith.science/api/pith-number/6I6IHGG4VU2YCWZLKGQNTDL6OD/events.json","paper":"https://pith.science/paper/6I6IHGG4"},"agent_actions":{"view_html":"https://pith.science/pith/6I6IHGG4VU2YCWZLKGQNTDL6OD","download_json":"https://pith.science/pith/6I6IHGG4VU2YCWZLKGQNTDL6OD.json","view_paper":"https://pith.science/paper/6I6IHGG4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=cond-mat/9702209&json=true","fetch_graph":"https://pith.science/api/pith-number/6I6IHGG4VU2YCWZLKGQNTDL6OD/graph.json","fetch_events":"https://pith.science/api/pith-number/6I6IHGG4VU2YCWZLKGQNTDL6OD/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6I6IHGG4VU2YCWZLKGQNTDL6OD/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6I6IHGG4VU2YCWZLKGQNTDL6OD/action/storage_attestation","attest_author":"https://pith.science/pith/6I6IHGG4VU2YCWZLKGQNTDL6OD/action/author_attestation","sign_citation":"https://pith.science/pith/6I6IHGG4VU2YCWZLKGQNTDL6OD/action/citation_signature","submit_replication":"https://pith.science/pith/6I6IHGG4VU2YCWZLKGQNTDL6OD/action/replication_record"}},"created_at":"2026-07-04T16:03:42.889799+00:00","updated_at":"2026-07-04T16:03:42.889799+00:00"}