{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:YGYW6RY3LM6GHTPMYREWPHVU4I","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":"ba0a3cb476a5793f97f5c419dfe0df0dfb5b116817fe0f9368f4e1fa1395dd61","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-06-06T08:28:41Z","title_canon_sha256":"c839ef9385b2f86c6c78fbf59af67f6dbb064dbb731f34002e41609c0b53c926"},"schema_version":"1.0","source":{"id":"1906.02475","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.02475","created_at":"2026-05-17T23:43:27Z"},{"alias_kind":"arxiv_version","alias_value":"1906.02475v2","created_at":"2026-05-17T23:43:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.02475","created_at":"2026-05-17T23:43:27Z"},{"alias_kind":"pith_short_12","alias_value":"YGYW6RY3LM6G","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"YGYW6RY3LM6GHTPM","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"YGYW6RY3","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:358bce5b5bc59df4dd522a6fe48a6b082e85a7d3db10028e7f6855a021b7152c","target":"graph","created_at":"2026-05-17T23:43:27Z","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":"Organic-inorganic metal halide perovskite devices have generated significant interest for LED, photodetector, and solar cell applications due to their attractive optoelectronic properties and substrate-choice flexibility1-4. These devices exhibit slow time-scale response, which have been explained by point defect migration5-6. In this work, we report the discovery of a room temperature intrinsic amplification process in methylammonium lead iodide perovskite (MAPbI3) that can be triggered by few photons, down to a single photon. The electrical properties of the material, by way of photoresponse","authors_text":"Alex Ce Zhang, Iftikhar Ahmad Niaz, Jiayun Zhou, Kenji Nomura, Lujiang Yan, Mohammad Abu Raihan Miah, Shaurya Arya, Sheng Xu, Yimu Chen, Yugang Yu, Yu-Hwa Lo, Yusheng Lei, Zihan Xu","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-06-06T08:28:41Z","title":"Discovery of Ionic Impact Ionization (I3) in Perovskites Triggered by a Single Photon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.02475","kind":"arxiv","version":2},"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":"sha256:331ba5ceaa8ce8a86b89516ac768e3a269cdd2f7dcd0760323289aca1d94661a","target":"record","created_at":"2026-05-17T23:43:27Z","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":"ba0a3cb476a5793f97f5c419dfe0df0dfb5b116817fe0f9368f4e1fa1395dd61","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-06-06T08:28:41Z","title_canon_sha256":"c839ef9385b2f86c6c78fbf59af67f6dbb064dbb731f34002e41609c0b53c926"},"schema_version":"1.0","source":{"id":"1906.02475","kind":"arxiv","version":2}},"canonical_sha256":"c1b16f471b5b3c63cdecc449679eb4e2359125f573dd94c267b8b2e3c7958cac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c1b16f471b5b3c63cdecc449679eb4e2359125f573dd94c267b8b2e3c7958cac","first_computed_at":"2026-05-17T23:43:27.490416Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:27.490416Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xRN0KiauVTKV1m81wV3zPSMO6ClS/D4R+fCmIv8iVSwZH6SYuYbD1dhR49GLxWLxm9NmkbqDclYS0Drj85BEBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:27.490939Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.02475","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:331ba5ceaa8ce8a86b89516ac768e3a269cdd2f7dcd0760323289aca1d94661a","sha256:358bce5b5bc59df4dd522a6fe48a6b082e85a7d3db10028e7f6855a021b7152c"],"state_sha256":"95c88a3b0b3dd5520d3fe1f2913229c2f763114b9e1903689fa2bd1bb98bbd47"}