{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:KB7B3F6XS3PF4SDS7O2RU64OZV","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":"2a856f743a9508c7962cb339acb7b59949807b1628eca7df52bcc4a423a63ba4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-07-18T11:01:55Z","title_canon_sha256":"276f28411878b5a12fddbc445fd81653ba5b650ddeadc9d8aa42e6fdc60c4595"},"schema_version":"1.0","source":{"id":"1807.06860","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.06860","created_at":"2026-05-18T00:09:58Z"},{"alias_kind":"arxiv_version","alias_value":"1807.06860v1","created_at":"2026-05-18T00:09:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.06860","created_at":"2026-05-18T00:09:58Z"},{"alias_kind":"pith_short_12","alias_value":"KB7B3F6XS3PF","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"KB7B3F6XS3PF4SDS","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"KB7B3F6X","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:4889d19fb158ed8c10eff14673c46f1ac4e62c8bde9a7f36463402be5407adbb","target":"graph","created_at":"2026-05-18T00:09:58Z","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 mechanisms behind the exceptional photovoltaic properties of the metallorganic perovskites are still debated, and include a ferroelectric (FE) state from the ordering of the electric dipoles of the organic molecules. We present the first anelastic (complex Young's modulus) and new dielectric measurements on CH$_{3}$NH$_{3}$PbI$_3$, which provide new insight on the reorientation dynamics of the organic molecules, and the reason why they do not form a FE state. The permittivity is fitted within the tetragonal phase with an expression that includes the coupling between FE and octahedral tilt ","authors_text":"Anna Maria Paoletti, Floriana Craciun, Francesco Cordero, Francesco Trequattrini, Giovanna Pennesi, Patrizia Imperatori","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-07-18T11:01:55Z","title":"Competition between Polar and Antiferrodistortive Modes and Correlated Dynamics of the Methylammonium Molecules in MAPbI$_3$ from Anelastic and Dielectric Measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.06860","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":"sha256:1173deceee4e427b70c23523ee1a91e948569eb304ebd8b9719bccc9bea0d2b4","target":"record","created_at":"2026-05-18T00:09:58Z","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":"2a856f743a9508c7962cb339acb7b59949807b1628eca7df52bcc4a423a63ba4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-07-18T11:01:55Z","title_canon_sha256":"276f28411878b5a12fddbc445fd81653ba5b650ddeadc9d8aa42e6fdc60c4595"},"schema_version":"1.0","source":{"id":"1807.06860","kind":"arxiv","version":1}},"canonical_sha256":"507e1d97d796de5e4872fbb51a7b8ecd602e68dd96d1938a829269a8010d3e0e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"507e1d97d796de5e4872fbb51a7b8ecd602e68dd96d1938a829269a8010d3e0e","first_computed_at":"2026-05-18T00:09:58.103600Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:58.103600Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I5oxWXEajdkUF3GuKN3f3Kf4mcG5dwuWlKILnjRGQ7/NmqHEvvpTPUbyvX//5hUqf7dQ3Ef+9FDlM5iIFpkUDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:58.104375Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.06860","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1173deceee4e427b70c23523ee1a91e948569eb304ebd8b9719bccc9bea0d2b4","sha256:4889d19fb158ed8c10eff14673c46f1ac4e62c8bde9a7f36463402be5407adbb"],"state_sha256":"938c5f6c1dccd5b5f220ab2147688c3a29d01b900b7c9315bf426dc7cffad16f"}