{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:M2JVRXDMGE3ITCQVAQKOMJONNQ","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":"14ae9f843ce2048b121edc62478ed8a76e507c16c6f4f80818d065bc3e8b5d23","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-08-18T00:44:08Z","title_canon_sha256":"1c6bc693f441a49bae2486e6a0d1f101c4f6d779b57ecbd506466e271bd84096"},"schema_version":"1.0","source":{"id":"1808.06026","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06026","created_at":"2026-05-18T00:02:31Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06026v1","created_at":"2026-05-18T00:02:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06026","created_at":"2026-05-18T00:02:31Z"},{"alias_kind":"pith_short_12","alias_value":"M2JVRXDMGE3I","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"M2JVRXDMGE3ITCQV","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"M2JVRXDM","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:6d80fc78f39d706a87c90296b65c0b3f9e3f6876b8005edc1934a58d9307a1d9","target":"graph","created_at":"2026-05-18T00:02:31Z","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 employ an optical pump-probe technique to study coherent phonon oscillations in Ca$_2$RuO$_4$. We find that oscillation-amplitude of an $A_g$ symmetric phonon mode is strongly suppressed at 260 K, a putative transition point of orbital ordering. The oscillation also shows a gradual but huge change in its $phase$, such that the oscillation even flips over with a 180$^{\\circ}$ change across the temperature. Density functional theory calculations indicate that the $A_g$ phonon has an eigenmode of octahedral distortion with conventional tilting along the $a$-axis and antipolar distortion of api","authors_text":"Bumjoo Lee, Byung Cheol Park, Choong H. Kim, C. Sow, F. Nakamura, Inho Kwak, J. Kim, K. W. Kim, Min-Cheol Lee, S. Yoon, T. W. Noh, Y. Maeno","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-08-18T00:44:08Z","title":"Abnormal $phase$ flip in coherent phonon oscillations of Ca$_2$RuO$_4$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06026","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":"sha256:28042c84325da073a2ffd8f3112fc1159db9bbab18fc5370a2fb6e8bae6ae561","target":"record","created_at":"2026-05-18T00:02:31Z","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":"14ae9f843ce2048b121edc62478ed8a76e507c16c6f4f80818d065bc3e8b5d23","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-08-18T00:44:08Z","title_canon_sha256":"1c6bc693f441a49bae2486e6a0d1f101c4f6d779b57ecbd506466e271bd84096"},"schema_version":"1.0","source":{"id":"1808.06026","kind":"arxiv","version":1}},"canonical_sha256":"669358dc6c3136898a150414e625cd6c38320897e4585b062b87f1667da2ba57","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"669358dc6c3136898a150414e625cd6c38320897e4585b062b87f1667da2ba57","first_computed_at":"2026-05-18T00:02:31.155210Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:31.155210Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VpGZnny6PmIif2Eqad9JsoiYtYvqwvEKfzJUa3leevze+EnmVkNzGRLR/OeF4UNVEeovaeV7Kf3seV6vrjxdDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:31.155901Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.06026","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:28042c84325da073a2ffd8f3112fc1159db9bbab18fc5370a2fb6e8bae6ae561","sha256:6d80fc78f39d706a87c90296b65c0b3f9e3f6876b8005edc1934a58d9307a1d9"],"state_sha256":"7f3848f8c7d8e88da9ca368a0e6e8296522a6f6657e0c39c824cb646e09dc0eb"}