{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:KTWSLBLTF6URUUQWNZYA5H42BS","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":"f9e7ae43a232b335f621a2f9c72e6e390ee6f7e485714115e32b7ff0ea1e7dff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-01-10T16:09:01Z","title_canon_sha256":"077ea08f4f7f8f2036090773cea244176a23a4bfdf65d08273912e9655b42c2a"},"schema_version":"1.0","source":{"id":"1801.03434","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03434","created_at":"2026-05-18T00:05:19Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03434v1","created_at":"2026-05-18T00:05:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03434","created_at":"2026-05-18T00:05:19Z"},{"alias_kind":"pith_short_12","alias_value":"KTWSLBLTF6UR","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"KTWSLBLTF6URUUQW","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"KTWSLBLT","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:f9589630ac696f43496b73f1b12b75bfbeadd3cd4033e3cd5d102bd610fa9f3f","target":"graph","created_at":"2026-05-18T00:05:19Z","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":"Hybrid organic-inorganic perovskites (HOIPs) have recently emerged as highly promising solution-processable materials for photovoltaic (PV) and other optoelectronic devices. HOIPs represent a broad family of materials with properties highly tuneable by the ions that make up the perovskite structure as well as their multiple combinations. Interestingly, recent high-efficiency PV devices using HOIPs with substantially improved long-term stability have used combinations of different ionic compositions. The structural dynamics of these systems are unique for semiconducting materials and are curren","authors_text":"Artem A. Bakulin, Carl Paterson, David A. Egger, Henry J. Snaith, Ido Azuri, Irina V. Kabakova, Leeor Kronik, Pabitra K. Nayak, Zhuoying Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-01-10T16:09:01Z","title":"The Effect of Ionic Composition on Acoustic Phonon Speeds in Hybrid Perovskites from Brillouin Spectroscopy and Density Functional Theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03434","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:a01e5880f24764d2926582ac6ae44ec596e733778a8d3cfdc5f029b1adc0d316","target":"record","created_at":"2026-05-18T00:05:19Z","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":"f9e7ae43a232b335f621a2f9c72e6e390ee6f7e485714115e32b7ff0ea1e7dff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-01-10T16:09:01Z","title_canon_sha256":"077ea08f4f7f8f2036090773cea244176a23a4bfdf65d08273912e9655b42c2a"},"schema_version":"1.0","source":{"id":"1801.03434","kind":"arxiv","version":1}},"canonical_sha256":"54ed2585732fa91a52166e700e9f9a0c8712e4dee8abe72addb12419ec7ec09d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"54ed2585732fa91a52166e700e9f9a0c8712e4dee8abe72addb12419ec7ec09d","first_computed_at":"2026-05-18T00:05:19.526603Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:19.526603Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8uEILNVbEB5vwm5Wl72RZBNQM183CmF4eb9rQtmQLVuPJqxP9NnwoNwdw+Wty9du+KseztLD170nRvxrWZ/jCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:19.527115Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.03434","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a01e5880f24764d2926582ac6ae44ec596e733778a8d3cfdc5f029b1adc0d316","sha256:f9589630ac696f43496b73f1b12b75bfbeadd3cd4033e3cd5d102bd610fa9f3f"],"state_sha256":"e30878edc22ea82ae35ea752d824d01d1b69c7d85d4f48ecc6c0a81ec078e41a"}