{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:ESCNCO5WXD7NR6NNH37KXMPJHJ","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":"f97c4089bc8838ea343278d5061cf230f1980adcd4110616ecccffbf46dcafd7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-08-09T20:40:57Z","title_canon_sha256":"d1f2aba6c55e1b6e4e0ee9a925953f969caf9946b183411eae3bde3c10cd1601"},"schema_version":"1.0","source":{"id":"1408.2152","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.2152","created_at":"2026-05-18T02:18:49Z"},{"alias_kind":"arxiv_version","alias_value":"1408.2152v1","created_at":"2026-05-18T02:18:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.2152","created_at":"2026-05-18T02:18:49Z"},{"alias_kind":"pith_short_12","alias_value":"ESCNCO5WXD7N","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"ESCNCO5WXD7NR6NN","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"ESCNCO5W","created_at":"2026-05-18T12:28:28Z"}],"graph_snapshots":[{"event_id":"sha256:0c289a2dcc228f1d73ad9d0b9660519ef647ec14001d0ab8344b131828c92de6","target":"graph","created_at":"2026-05-18T02:18:49Z","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 investigate the excitation spectrum of strongly correlated sodium cobaltate within a realistic many-body description beyond dynamical mean-field theory (DMFT). At lower doping around $x$=0.3, rather close to Mott-critical half-filling, the single-particle spectral function of Na$_x$CoO$_2$ displays an upper Hubbard band which is captured within DMFT. Momentum-dependent self-energy effects beyond DMFT become dominant at higher doping. Around a doping level of $x\\sim 0.67$, the incoherent excitations give way to finite-energy spin-polaron excitations in close agreement with optics experiments","authors_text":"Alexander I. Lichtenstein, Aljoscha Wilhelm, Frank Lechermann, Hartmut Hafermann, Mikhail I. Katsnelson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-08-09T20:40:57Z","title":"From Hubbard bands to spin-polaron excitations in the doped Mott material Na$_x$CoO$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.2152","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":"sha256:200b0031970bc906ecb5443b650e7a0a4add78a8c1fec85f3b47b733998de5fd","target":"record","created_at":"2026-05-18T02:18:49Z","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":"f97c4089bc8838ea343278d5061cf230f1980adcd4110616ecccffbf46dcafd7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-08-09T20:40:57Z","title_canon_sha256":"d1f2aba6c55e1b6e4e0ee9a925953f969caf9946b183411eae3bde3c10cd1601"},"schema_version":"1.0","source":{"id":"1408.2152","kind":"arxiv","version":1}},"canonical_sha256":"2484d13bb6b8fed8f9ad3efeabb1e93a72bf68000503b591faa6105afdccf141","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2484d13bb6b8fed8f9ad3efeabb1e93a72bf68000503b591faa6105afdccf141","first_computed_at":"2026-05-18T02:18:49.601227Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:18:49.601227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eLFmcxFLYrvehIM7fliDa1lxSHB/CYqWSTGJFiGtegd65YcMN9/vlKqnz2hD0s3sUhJMl+DTYVZSUF9i2Oj7CA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:18:49.602057Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.2152","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:200b0031970bc906ecb5443b650e7a0a4add78a8c1fec85f3b47b733998de5fd","sha256:0c289a2dcc228f1d73ad9d0b9660519ef647ec14001d0ab8344b131828c92de6"],"state_sha256":"355f3a566df6873e1bf5879558111d32b5cd12c2b288e1875cf8dba2a4a0b189"}