{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:HB564G3CX5FAAUZOH5ZQDMVAY5","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":"bceed329367f9b70283631586025cf2519922eaa1155ec16569c5268403c9c44","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2025-08-30T20:01:33Z","title_canon_sha256":"0f2508fd7b393d7562aad9c61ac9f4c586a9b6ab7e08ce98ecb2ac8a48ed8083"},"schema_version":"1.0","source":{"id":"2509.00600","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.00600","created_at":"2026-07-05T12:09:23Z"},{"alias_kind":"arxiv_version","alias_value":"2509.00600v2","created_at":"2026-07-05T12:09:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.00600","created_at":"2026-07-05T12:09:23Z"},{"alias_kind":"pith_short_12","alias_value":"HB564G3CX5FA","created_at":"2026-07-05T12:09:23Z"},{"alias_kind":"pith_short_16","alias_value":"HB564G3CX5FAAUZO","created_at":"2026-07-05T12:09:23Z"},{"alias_kind":"pith_short_8","alias_value":"HB564G3C","created_at":"2026-07-05T12:09:23Z"}],"graph_snapshots":[{"event_id":"sha256:7fb41d2de36e0e321fcaf82db5f154c19e8d06eefbf3431d91d5b32390bd4c95","target":"graph","created_at":"2026-07-05T12:09:23Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2509.00600/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This work demonstrates a prototype bi-layer piezoelectric micromachined ultrasonic transducer (PMUT) based on transferred periodically poled piezoelectric film (P3F) X-cut lithium niobate (LN). Opposite in-plane polarizations in the piezoelectric film stack are employed to enable efficient lateral field excitation of the flexural mode. Thanks to its high piezoelectric coefficient and low dielectric loss, the X-cut LN exhibits high figure of merits (FoMs) as both sensors and transducers. The fabricated PMUT demonstrates an out-of-plane mode near 1 MHz with an electromechanical coupling of 3.6\\%","authors_text":"Byeongjin Kim, Neal Hall, Ruochen Lu, Tzu-Husan Hsu, Vakhtang Chuluhadze, Xiaoyu Niu, Zihuan Liu, Ziqian Yao","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2025-08-30T20:01:33Z","title":"Bimorph Lithium Niobate Piezoelectric Micromachined Ultrasonic Transducer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.00600","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":"sha256:3b1946f9e28c5236b57e2b1fdd08770640590b9bf46792f45a6e941c299881bd","target":"record","created_at":"2026-07-05T12:09:23Z","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":"bceed329367f9b70283631586025cf2519922eaa1155ec16569c5268403c9c44","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2025-08-30T20:01:33Z","title_canon_sha256":"0f2508fd7b393d7562aad9c61ac9f4c586a9b6ab7e08ce98ecb2ac8a48ed8083"},"schema_version":"1.0","source":{"id":"2509.00600","kind":"arxiv","version":2}},"canonical_sha256":"387bee1b62bf4a00532e3f7301b2a0c762ec5e21c709425a20cd6f21b8fa1f5d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"387bee1b62bf4a00532e3f7301b2a0c762ec5e21c709425a20cd6f21b8fa1f5d","first_computed_at":"2026-07-05T12:09:23.606859Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:09:23.606859Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6aOrjkZf0agpPu5DVf6kvQdOLl8RwBwHymX+RsKpo1tZaU3Cw5eLPiaTjszes4I+fmXmiTrRPhi6BYkz4onOAw==","signature_status":"signed_v1","signed_at":"2026-07-05T12:09:23.607372Z","signed_message":"canonical_sha256_bytes"},"source_id":"2509.00600","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3b1946f9e28c5236b57e2b1fdd08770640590b9bf46792f45a6e941c299881bd","sha256:7fb41d2de36e0e321fcaf82db5f154c19e8d06eefbf3431d91d5b32390bd4c95"],"state_sha256":"40fb927f6a4c1fd5d59e27823a7042b1819e999d75873c0bed1520342b2e6a6a"}