{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:C3TMGB2Z2F4HT7WUOGYD7UEVGY","short_pith_number":"pith:C3TMGB2Z","canonical_record":{"source":{"id":"1203.1752","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-08T11:09:53Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"40af275de0c0a657e8c2b397488bb4c3d107b85180755a446b0ccc3ea9c2d7c8","abstract_canon_sha256":"58c4bd7194775cacc7622e13b90bcf34568cf70a1cd9b985249d8207af21ea67"},"schema_version":"1.0"},"canonical_sha256":"16e6c30759d17879fed471b03fd095362efb2036610ea8454607c000715fcf5f","source":{"kind":"arxiv","id":"1203.1752","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.1752","created_at":"2026-05-18T04:00:37Z"},{"alias_kind":"arxiv_version","alias_value":"1203.1752v1","created_at":"2026-05-18T04:00:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.1752","created_at":"2026-05-18T04:00:37Z"},{"alias_kind":"pith_short_12","alias_value":"C3TMGB2Z2F4H","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"C3TMGB2Z2F4HT7WU","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"C3TMGB2Z","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:C3TMGB2Z2F4HT7WUOGYD7UEVGY","target":"record","payload":{"canonical_record":{"source":{"id":"1203.1752","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-08T11:09:53Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"40af275de0c0a657e8c2b397488bb4c3d107b85180755a446b0ccc3ea9c2d7c8","abstract_canon_sha256":"58c4bd7194775cacc7622e13b90bcf34568cf70a1cd9b985249d8207af21ea67"},"schema_version":"1.0"},"canonical_sha256":"16e6c30759d17879fed471b03fd095362efb2036610ea8454607c000715fcf5f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:00:37.095053Z","signature_b64":"S8yHHXYulh9yaLEa/eqXKuXAy5nFKEUOw+eHI8GOpzNXh+/YSwPlNKj3FJ7qBxydDVQ88usUF7z95RuuXfTVBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16e6c30759d17879fed471b03fd095362efb2036610ea8454607c000715fcf5f","last_reissued_at":"2026-05-18T04:00:37.094416Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:00:37.094416Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.1752","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:00:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tUqTLjn7eu/yGfCeNzAqn8scfgX8X6TaZ7YngRRosirjqv0SuZtYj2fsgn7m/l+9Mvpu4Tg44gofrVpXD3ZvCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T09:52:03.249389Z"},"content_sha256":"016f6fd7c7e422b31a96864862c0353d57dae28af6890f5a9ec64a44d1621d9e","schema_version":"1.0","event_id":"sha256:016f6fd7c7e422b31a96864862c0353d57dae28af6890f5a9ec64a44d1621d9e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:C3TMGB2Z2F4HT7WUOGYD7UEVGY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First principles calculation of the phonons modes in the hexagonal $\\rm YMnO_3$ ferroelectric and paraelectric phases","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Julien Varignon, Marie-Bernadette Lepetit, S\\'ebastien Petit","submitted_at":"2012-03-08T11:09:53Z","abstract_excerpt":"The lattice dynamics of the $\\rm YMnO_3$ magneto-electric compound has been investigated using density functional calculations, both in the ferroelectric and the paraelectric phases. The coherence between the computed and experimental data is very good in the low temperature phase. Using group theory, modes continuity and our calculations we were able to show that the phonons modes observed by Raman scattering at 1200K are only compatible with the ferroelectric $P6_{3} cm$ space group, thus supporting the idea of a ferroelectric to paraelectric phase transition at higher temperature. Finally w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.1752","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:00:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/SEpT9cq9x9ohQKS3XrW6JTGqrNbN84qYF6coeuAOR0Td1SktuqvaFac5TO/8NOaaBDfggmtOV3dTUbC1wICBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T09:52:03.249740Z"},"content_sha256":"d53a4c966a35a51215cdba86e841608fd8a04c573f6ad3ea15ec8704066c2534","schema_version":"1.0","event_id":"sha256:d53a4c966a35a51215cdba86e841608fd8a04c573f6ad3ea15ec8704066c2534"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C3TMGB2Z2F4HT7WUOGYD7UEVGY/bundle.json","state_url":"https://pith.science/pith/C3TMGB2Z2F4HT7WUOGYD7UEVGY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C3TMGB2Z2F4HT7WUOGYD7UEVGY/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-20T09:52:03Z","links":{"resolver":"https://pith.science/pith/C3TMGB2Z2F4HT7WUOGYD7UEVGY","bundle":"https://pith.science/pith/C3TMGB2Z2F4HT7WUOGYD7UEVGY/bundle.json","state":"https://pith.science/pith/C3TMGB2Z2F4HT7WUOGYD7UEVGY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C3TMGB2Z2F4HT7WUOGYD7UEVGY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:C3TMGB2Z2F4HT7WUOGYD7UEVGY","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":"58c4bd7194775cacc7622e13b90bcf34568cf70a1cd9b985249d8207af21ea67","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-08T11:09:53Z","title_canon_sha256":"40af275de0c0a657e8c2b397488bb4c3d107b85180755a446b0ccc3ea9c2d7c8"},"schema_version":"1.0","source":{"id":"1203.1752","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.1752","created_at":"2026-05-18T04:00:37Z"},{"alias_kind":"arxiv_version","alias_value":"1203.1752v1","created_at":"2026-05-18T04:00:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.1752","created_at":"2026-05-18T04:00:37Z"},{"alias_kind":"pith_short_12","alias_value":"C3TMGB2Z2F4H","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"C3TMGB2Z2F4HT7WU","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"C3TMGB2Z","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:d53a4c966a35a51215cdba86e841608fd8a04c573f6ad3ea15ec8704066c2534","target":"graph","created_at":"2026-05-18T04:00:37Z","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 lattice dynamics of the $\\rm YMnO_3$ magneto-electric compound has been investigated using density functional calculations, both in the ferroelectric and the paraelectric phases. The coherence between the computed and experimental data is very good in the low temperature phase. Using group theory, modes continuity and our calculations we were able to show that the phonons modes observed by Raman scattering at 1200K are only compatible with the ferroelectric $P6_{3} cm$ space group, thus supporting the idea of a ferroelectric to paraelectric phase transition at higher temperature. Finally w","authors_text":"Julien Varignon, Marie-Bernadette Lepetit, S\\'ebastien Petit","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-08T11:09:53Z","title":"First principles calculation of the phonons modes in the hexagonal $\\rm YMnO_3$ ferroelectric and paraelectric phases"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.1752","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":"sha256:016f6fd7c7e422b31a96864862c0353d57dae28af6890f5a9ec64a44d1621d9e","target":"record","created_at":"2026-05-18T04:00:37Z","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":"58c4bd7194775cacc7622e13b90bcf34568cf70a1cd9b985249d8207af21ea67","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-08T11:09:53Z","title_canon_sha256":"40af275de0c0a657e8c2b397488bb4c3d107b85180755a446b0ccc3ea9c2d7c8"},"schema_version":"1.0","source":{"id":"1203.1752","kind":"arxiv","version":1}},"canonical_sha256":"16e6c30759d17879fed471b03fd095362efb2036610ea8454607c000715fcf5f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16e6c30759d17879fed471b03fd095362efb2036610ea8454607c000715fcf5f","first_computed_at":"2026-05-18T04:00:37.094416Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:00:37.094416Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"S8yHHXYulh9yaLEa/eqXKuXAy5nFKEUOw+eHI8GOpzNXh+/YSwPlNKj3FJ7qBxydDVQ88usUF7z95RuuXfTVBA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:00:37.095053Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.1752","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:016f6fd7c7e422b31a96864862c0353d57dae28af6890f5a9ec64a44d1621d9e","sha256:d53a4c966a35a51215cdba86e841608fd8a04c573f6ad3ea15ec8704066c2534"],"state_sha256":"2acdadfdbd557e270738878f839a36d40639ee8fa1916b5428677742ca4e6213"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JC9462yuxTFeqHWPbelEE6ehTVkwY2jc7uoe9pBZULzBKUit+HdDVocD10DxRR2YUtOcPx7nS3Ck2Pu+hUj6Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T09:52:03.251643Z","bundle_sha256":"31ec7c714284e22f5b43fc9b040644d9b5de3165b7b7a8c9e9ef0e9800079072"}}