{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:6MOSJEPFJVBWPW5QJYLQO5VN3U","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":"ef3f6f7ccc0c3bc901ab1fc6c682d588851b3e8491115d171b598fffdf6fa5aa","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-08-11T17:30:08Z","title_canon_sha256":"d92c323d49fd1ded9df26fe2f6d1bb0c9aad5bdb738ecad4d3142d4a70e51b5c"},"schema_version":"1.0","source":{"id":"1108.2470","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.2470","created_at":"2026-05-18T02:21:42Z"},{"alias_kind":"arxiv_version","alias_value":"1108.2470v1","created_at":"2026-05-18T02:21:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.2470","created_at":"2026-05-18T02:21:42Z"},{"alias_kind":"pith_short_12","alias_value":"6MOSJEPFJVBW","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6MOSJEPFJVBWPW5Q","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6MOSJEPF","created_at":"2026-05-18T12:26:22Z"}],"graph_snapshots":[{"event_id":"sha256:0d65e087def63950eeffb970fd978c05fc523b430752394a80d64a8c445b5895","target":"graph","created_at":"2026-05-18T02:21:42Z","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 report the first measurements of phonon dispersion curves on the (001) surface of the strong three-dimensional topological insulator Bi2Se3. The surface phonon measurements were carried out with the aid of coherent helium beam surface scattering techniques. The results reveal a prominent signature of the exotic metallic Dirac fermion quasi-particles, including a strong Kohn anomaly. The signature is manifest in a low energy isotropic convex dispersive surface phonon branch with a frequency maximum of 1.8 THz, and having a V-shaped minimum at approximately 2kF that defines the Kohn anomaly. ","authors_text":"C. Chamon, C. Howard, F.C. Chou, L. Santos, M. El-Batanouny, R. Sankar, S. Chikara, Xuetao Zhu","cross_cats":["cond-mat.mes-hall","cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-08-11T17:30:08Z","title":"Interaction of Phonons and Dirac Fermions on the Surface of Bi2Se3: A Strong Kohn Anomaly"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.2470","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:a9ff4d579a711a7783b841b04d6f8164f953fb0e28e4453aa32e30715a7196e2","target":"record","created_at":"2026-05-18T02:21:42Z","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":"ef3f6f7ccc0c3bc901ab1fc6c682d588851b3e8491115d171b598fffdf6fa5aa","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-08-11T17:30:08Z","title_canon_sha256":"d92c323d49fd1ded9df26fe2f6d1bb0c9aad5bdb738ecad4d3142d4a70e51b5c"},"schema_version":"1.0","source":{"id":"1108.2470","kind":"arxiv","version":1}},"canonical_sha256":"f31d2491e54d4367dbb04e170776addd19ee2b145229e697e9a311d2a8a026b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f31d2491e54d4367dbb04e170776addd19ee2b145229e697e9a311d2a8a026b0","first_computed_at":"2026-05-18T02:21:42.147422Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:21:42.147422Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SAzHI5tubZg7ljbqR3y31HtSwR1aTEi7ZDc1yp+Ra21HhKAp6Dtm+mnq1lbGIsW1w5XKqCgtpo1EkxgKcBroBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:21:42.148495Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.2470","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9ff4d579a711a7783b841b04d6f8164f953fb0e28e4453aa32e30715a7196e2","sha256:0d65e087def63950eeffb970fd978c05fc523b430752394a80d64a8c445b5895"],"state_sha256":"276033e89f6b7f0f28e3303a22a9fa6a29ab0109139ef772fd47fc1b086aec80"}