{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:AY5DD2L2645UXZANJANILQAHT6","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":"0b4941666103572ed812b051aad0cd8c1bcc745b8dad0d662f33581adbfe1c46","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-04-21T10:11:07Z","title_canon_sha256":"591aae8f02d055b65e279a54448fa3247e890e68217b88b2f95dd11eea0f9820"},"schema_version":"1.0","source":{"id":"0904.3205","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0904.3205","created_at":"2026-05-18T02:13:58Z"},{"alias_kind":"arxiv_version","alias_value":"0904.3205v1","created_at":"2026-05-18T02:13:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0904.3205","created_at":"2026-05-18T02:13:58Z"},{"alias_kind":"pith_short_12","alias_value":"AY5DD2L2645U","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"AY5DD2L2645UXZAN","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"AY5DD2L2","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:5c0d6cfb2ba9510ce58c718e70936b4897edf419b68c1f48a91d952c4ff2296b","target":"graph","created_at":"2026-05-18T02:13:58Z","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":"The two-dimensional mapping of the phonon dispersions around the $K$ point of graphite by inelastic x-ray scattering is provided. The present work resolves the longstanding issue related to the correct assignment of transverse and longitudinal phonon branches at $K$. We observe an almost degeneracy of the three TO, LA and LO derived phonon branches and a strong phonon trigonal warping. Correlation effects renormalize the Kohn anomaly of the TO mode, which exhibits a trigonal warping effect opposite to that of the electronic band structure. We determined the electron--phonon coupling constant t","authors_text":"A. Bosak, A. Gr\\\"uneis, A. Rubio, C. Attaccalite, F. Mauri, J. Serrano, L. Wirtz, M. Krisch, M. Lazzeri, S.L. Molodtsov, T. Pichler","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-04-21T10:11:07Z","title":"Phonon surface mapping of graphite: disentangling quasi--degenerate phonon dispersions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0904.3205","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":"sha256:127ebc826b11ca74dfa089930546e805ccb4892972109037343aa90c45e6a41b","target":"record","created_at":"2026-05-18T02:13:58Z","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":"0b4941666103572ed812b051aad0cd8c1bcc745b8dad0d662f33581adbfe1c46","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-04-21T10:11:07Z","title_canon_sha256":"591aae8f02d055b65e279a54448fa3247e890e68217b88b2f95dd11eea0f9820"},"schema_version":"1.0","source":{"id":"0904.3205","kind":"arxiv","version":1}},"canonical_sha256":"063a31e97af73b4be40d481a85c0079fa53e9a4f94cc12ed3929bcd62c3d2b91","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"063a31e97af73b4be40d481a85c0079fa53e9a4f94cc12ed3929bcd62c3d2b91","first_computed_at":"2026-05-18T02:13:58.583036Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:58.583036Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d11LFKKt2KgzWgQB8KkA4ZnhVcLjU44cVYky85gi5/a5EjbocHb5Zj9UTB6gSmLtndseyVQ556pifbrZZQvNBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:58.583771Z","signed_message":"canonical_sha256_bytes"},"source_id":"0904.3205","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:127ebc826b11ca74dfa089930546e805ccb4892972109037343aa90c45e6a41b","sha256:5c0d6cfb2ba9510ce58c718e70936b4897edf419b68c1f48a91d952c4ff2296b"],"state_sha256":"a37a97c85d4b70a7e9b1964fdc3aea7bd4b8d9bfd512fa3c0c86f11623f8d9fa"}