{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:BA5ZMNPSS3HM7J4LJ7WUQXJXT4","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":"afa3603b738059c9f2943731ec82cf37b97f82a36c9ae26c41a034c0c2bc81d1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-01-21T20:56:02Z","title_canon_sha256":"c5a3fd55f53620d37580623f169db159c7637ddc5c9903d5cb9dcb2dba2b6327"},"schema_version":"1.0","source":{"id":"1301.4985","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.4985","created_at":"2026-05-18T03:26:40Z"},{"alias_kind":"arxiv_version","alias_value":"1301.4985v1","created_at":"2026-05-18T03:26:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.4985","created_at":"2026-05-18T03:26:40Z"},{"alias_kind":"pith_short_12","alias_value":"BA5ZMNPSS3HM","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"BA5ZMNPSS3HM7J4L","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"BA5ZMNPS","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:55b6abdd5448449dceaf57c60d7e76e43f2f0ca829f7f93eea6801d98e638b4b","target":"graph","created_at":"2026-05-18T03:26:40Z","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":"Trilayer graphene in both ABA (Bernal) and ABC (rhombohedral) stacking sequences is shown to exhibit intense infrared absorption from in-plane optical phonons. The feature, lying at ~1580 cm-1, changes strongly with electrostatic gating. For ABC-stacked graphene trilayers, we observed a large enhancement in phonon absorption amplitude, as well as softening of the phonon mode, as the Fermi level is tuned away from charge neutrality. A similar, but substantially weaker effect is seen in samples with the more common ABA stacking order. The strong infrared response of the optical phonons and the p","authors_text":"Chun Hung Lui, Emmanuele Cappelluti, Tony F. Heinz, Zhiqiang Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-01-21T20:56:02Z","title":"Tunable Infrared Phonon Anomalies in Trilayer Graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.4985","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:de784889145ec10b222e67de80e524be7fe181bb7d33b1e3c7550c416dd657e9","target":"record","created_at":"2026-05-18T03:26:40Z","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":"afa3603b738059c9f2943731ec82cf37b97f82a36c9ae26c41a034c0c2bc81d1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-01-21T20:56:02Z","title_canon_sha256":"c5a3fd55f53620d37580623f169db159c7637ddc5c9903d5cb9dcb2dba2b6327"},"schema_version":"1.0","source":{"id":"1301.4985","kind":"arxiv","version":1}},"canonical_sha256":"083b9635f296cecfa78b4fed485d379f32e7f228f3829eb2b60d7950cec5881f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"083b9635f296cecfa78b4fed485d379f32e7f228f3829eb2b60d7950cec5881f","first_computed_at":"2026-05-18T03:26:40.911350Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:26:40.911350Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Vl7U5VT16RdDd3bvYzD453Iv5vaiDB3x6gxyqAzwFuv4A3T8Qo4pzRENIKj+jIzKLpsobCdkC9VTdQxnBW3dBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:26:40.911957Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.4985","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:de784889145ec10b222e67de80e524be7fe181bb7d33b1e3c7550c416dd657e9","sha256:55b6abdd5448449dceaf57c60d7e76e43f2f0ca829f7f93eea6801d98e638b4b"],"state_sha256":"540d166f060d1d6ef923a1177fd6a2160f5035bf65d3e87ce0883df3f4d47e14"}