{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:3T7WW6PDDAUNCYYRBAB54RV6SY","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":"e464930585de3fc356d07a961883cbca3d0e9e8532b7d6811552ae9164e7d1fa","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-02-19T18:08:48Z","title_canon_sha256":"872d92e84ab499c4a8ba5fdc51059d0759d0e94104525abcb8d2093b44f6a105"},"schema_version":"1.0","source":{"id":"1502.05659","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.05659","created_at":"2026-05-18T01:55:52Z"},{"alias_kind":"arxiv_version","alias_value":"1502.05659v2","created_at":"2026-05-18T01:55:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.05659","created_at":"2026-05-18T01:55:52Z"},{"alias_kind":"pith_short_12","alias_value":"3T7WW6PDDAUN","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"3T7WW6PDDAUNCYYR","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"3T7WW6PD","created_at":"2026-05-18T12:29:02Z"}],"graph_snapshots":[{"event_id":"sha256:2d72f051abb156f4f163585e285e04ce08584812f8e527f34a44b7c1a553f46e","target":"graph","created_at":"2026-05-18T01:55:52Z","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":"We consider a class of strongly correlated Fermi systems that exhibit an interaction-induced flat band pinned to the Fermi surface, and generalize the Landau strategy to accommodate a flat band and apply the more comprehensive theory to electron systems of solids. The non-Fermi-liquid behavior that emerges is compared with relevant experimental data on heavy-fermion metals and electron-doped high-$T_c$ compounds. We elucidate how heavy-fermion metals have extremely low superconducting transition temperature $T_c$, its maximum reached in the heavy-fermion metal CeCoIn$_5$ does not exceed 2.3 K,","authors_text":"J.W. Clark, K.G. Popov, V.A. Khodel, V.R. Shaginyan","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-02-19T18:08:48Z","title":"Occurrence of flat bands in strongly correlated Fermi systems and high-$T_c$ superconductivity of electron-doped compounds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.05659","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:bd7229f1a61704edb98dace57c21a6f6e35b226d9423922024f8e81e54e41ee7","target":"record","created_at":"2026-05-18T01:55:52Z","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":"e464930585de3fc356d07a961883cbca3d0e9e8532b7d6811552ae9164e7d1fa","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-02-19T18:08:48Z","title_canon_sha256":"872d92e84ab499c4a8ba5fdc51059d0759d0e94104525abcb8d2093b44f6a105"},"schema_version":"1.0","source":{"id":"1502.05659","kind":"arxiv","version":2}},"canonical_sha256":"dcff6b79e31828d163110803de46be96120a7a3a896568349d12bee1d72cfc9e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dcff6b79e31828d163110803de46be96120a7a3a896568349d12bee1d72cfc9e","first_computed_at":"2026-05-18T01:55:52.710081Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:52.710081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dBnXhKSVtkzK135W7kJnQcPj+SYmoIUDqfsYpWJOMmCyGSW3bsvfo8DkQq4+Y9ZPTeIxeZkJubtVHPSi4H5FCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:52.710473Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.05659","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd7229f1a61704edb98dace57c21a6f6e35b226d9423922024f8e81e54e41ee7","sha256:2d72f051abb156f4f163585e285e04ce08584812f8e527f34a44b7c1a553f46e"],"state_sha256":"f339edde85871c2bb413602cf12e6035bb877209e36c8e158293fe9094c997d2"}