{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:VLE7MTGGXVYOQUSOFZ3RKTH2B3","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":"3ed35d8ef04c765e4965d20b603216c7d0840c79aa527238ccc237fbe8b63f41","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-09-01T13:17:30Z","title_canon_sha256":"da79c0085d0b0799df53f202ecb22cf3beb3baace58d657466869325ee99724c"},"schema_version":"1.0","source":{"id":"1409.0408","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.0408","created_at":"2026-05-18T02:20:19Z"},{"alias_kind":"arxiv_version","alias_value":"1409.0408v3","created_at":"2026-05-18T02:20:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.0408","created_at":"2026-05-18T02:20:19Z"},{"alias_kind":"pith_short_12","alias_value":"VLE7MTGGXVYO","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VLE7MTGGXVYOQUSO","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VLE7MTGG","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:43e6cdb7c9738f3825e775d973e825c04d6aaec234d29dbe8797162829ee81c2","target":"graph","created_at":"2026-05-18T02:20:19Z","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 analyze the temperature and doping dependence of the specific heat $C(T)$ in Na$_x$CoO$_2$. This material was conjectured to undergo a Lifshitz -type topological transition at $x =x_c =0.62$, in which a new electron Fermi pocket emerges at the $\\Gamma$ point, in addition to the existing hole pocket with large $k_F$. The data show that near $x =x_c$, the temperature dependence of $C(T)/T$ at low $T$ gets stronger as $x$ approaches $x_c$ from below and then reverses the trend and changes sign at $x \\geq x_c$. We argue that this behavior can be quantitatively explained within the spin-fluctuat","authors_text":"Andrey V. Chubukov, Joseph J. Betouras, Sergey Slizovskiy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-09-01T13:17:30Z","title":"Magnetic fluctuations and specific heat in NaxCoO2 near a Lifshitz topological transition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.0408","kind":"arxiv","version":3},"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:bc36816ab83f9f08927b06f84d9b0aa993e37dd6accffad5250fed44ee90a897","target":"record","created_at":"2026-05-18T02:20:19Z","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":"3ed35d8ef04c765e4965d20b603216c7d0840c79aa527238ccc237fbe8b63f41","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-09-01T13:17:30Z","title_canon_sha256":"da79c0085d0b0799df53f202ecb22cf3beb3baace58d657466869325ee99724c"},"schema_version":"1.0","source":{"id":"1409.0408","kind":"arxiv","version":3}},"canonical_sha256":"aac9f64cc6bd70e8524e2e77154cfa0ef1bc4ed0e78dbf98b15c07e13cecaa88","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aac9f64cc6bd70e8524e2e77154cfa0ef1bc4ed0e78dbf98b15c07e13cecaa88","first_computed_at":"2026-05-18T02:20:19.807638Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:20:19.807638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"njlPYNd3Ji/kCrA3GKzBgmBDyiyi0hiWv/bx9jCUOEUi1G/FhMyiabu5JqOH/DxBYGdUjbatqfINxpLKfnR+BA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:20:19.808374Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.0408","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bc36816ab83f9f08927b06f84d9b0aa993e37dd6accffad5250fed44ee90a897","sha256:43e6cdb7c9738f3825e775d973e825c04d6aaec234d29dbe8797162829ee81c2"],"state_sha256":"bb98e827a3f5d00957c1441781b07d2c943a4948cc2f1d45f7ba1b6d1d9c6415"}