{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4K5TUFPHKDHC3AKQ3CHJFDXNZB","short_pith_number":"pith:4K5TUFPH","canonical_record":{"source":{"id":"1808.06076","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-18T11:58:47Z","cross_cats_sorted":[],"title_canon_sha256":"02c12f6542ac5c3410194fd5e2fdf2b0fbbdce05c260c847c981ff584d99c90d","abstract_canon_sha256":"854cba9e14c3b21a33dcba52d759c510f1dca93499ee8cdefed026c4cc9c856b"},"schema_version":"1.0"},"canonical_sha256":"e2bb3a15e750ce2d8150d88e928eedc87c85ae1757587390c37577e4df3f53b9","source":{"kind":"arxiv","id":"1808.06076","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06076","created_at":"2026-05-18T00:07:46Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06076v1","created_at":"2026-05-18T00:07:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06076","created_at":"2026-05-18T00:07:46Z"},{"alias_kind":"pith_short_12","alias_value":"4K5TUFPHKDHC","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4K5TUFPHKDHC3AKQ","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4K5TUFPH","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4K5TUFPHKDHC3AKQ3CHJFDXNZB","target":"record","payload":{"canonical_record":{"source":{"id":"1808.06076","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-18T11:58:47Z","cross_cats_sorted":[],"title_canon_sha256":"02c12f6542ac5c3410194fd5e2fdf2b0fbbdce05c260c847c981ff584d99c90d","abstract_canon_sha256":"854cba9e14c3b21a33dcba52d759c510f1dca93499ee8cdefed026c4cc9c856b"},"schema_version":"1.0"},"canonical_sha256":"e2bb3a15e750ce2d8150d88e928eedc87c85ae1757587390c37577e4df3f53b9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:07:46.181444Z","signature_b64":"AoDwS/zDTl4Mzq5tYJwSaRGiHIVtRp9dA8McCWfsj4puD8rRcPKbkyC/AuzRZ1W+KholFujktPnBje7B/ZusCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e2bb3a15e750ce2d8150d88e928eedc87c85ae1757587390c37577e4df3f53b9","last_reissued_at":"2026-05-18T00:07:46.180792Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:07:46.180792Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.06076","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":"2026-05-18T00:07:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"apK+RVsH/FqhdM8O8ZFqCWYjP2IdpDeADa2wnXKEyq1gMzna6HejMxhGSK8Mo30uVM/GRSh96/2ufOj3rBtLBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:34:13.379223Z"},"content_sha256":"f4ede8b6a684a80ff522601ceb6c02f6c73d045012f4df6b1942b2e9b88c2edb","schema_version":"1.0","event_id":"sha256:f4ede8b6a684a80ff522601ceb6c02f6c73d045012f4df6b1942b2e9b88c2edb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4K5TUFPHKDHC3AKQ3CHJFDXNZB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Oxygen vacancy-induced structural evolution of SrFeO$_{3-x}$ epitaxial thin film from brownmillerite to perovskite","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Glamazda, Amit Khare, Jungseek Hwang, K.-Y. Choi, Myounghoon Lee, Seokbae Lee, Seulki Roh, Sungmin Woo, Taesup Yoo, Woo Seok Choi, Yu-Seong Seo","submitted_at":"2018-08-18T11:58:47Z","abstract_excerpt":"We investigated SrFeO$_{3-x}$ thin films on a SrTiO$_3$ (001) substrate prepared via pulsed laser epitaxy using an optical spectroscopy technique. The oxygen vacancy level ($x$) was controlled by post-annealing processes at different oxygen partial pressures. We achieved a brownmillerite(BM) structure at $x =$ 0.5 and observed the evolution of the crystal structure from BM into perovskite(PV) as the oxygen concentration increased. We observed the evolution of infrared-active phonons with respect to the oxygen concentration, which was closely related to the structural evolution observed via X-r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06076","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":"2026-05-18T00:07:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mzbbftegs/9HtEr5eapKGoT4nHdQjA3eQ5Kk9GAO6Ndp1dbF6rjR2rgPYDkGYnNPd2chI+GWrZZzIPlt4T5yAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:34:13.379582Z"},"content_sha256":"0e582ca0754c6e3b64c6af8667b3a8e55c9c48dd40e0335af866dac69aa88fab","schema_version":"1.0","event_id":"sha256:0e582ca0754c6e3b64c6af8667b3a8e55c9c48dd40e0335af866dac69aa88fab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4K5TUFPHKDHC3AKQ3CHJFDXNZB/bundle.json","state_url":"https://pith.science/pith/4K5TUFPHKDHC3AKQ3CHJFDXNZB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4K5TUFPHKDHC3AKQ3CHJFDXNZB/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":"2026-05-31T00:34:13Z","links":{"resolver":"https://pith.science/pith/4K5TUFPHKDHC3AKQ3CHJFDXNZB","bundle":"https://pith.science/pith/4K5TUFPHKDHC3AKQ3CHJFDXNZB/bundle.json","state":"https://pith.science/pith/4K5TUFPHKDHC3AKQ3CHJFDXNZB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4K5TUFPHKDHC3AKQ3CHJFDXNZB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4K5TUFPHKDHC3AKQ3CHJFDXNZB","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":"854cba9e14c3b21a33dcba52d759c510f1dca93499ee8cdefed026c4cc9c856b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-18T11:58:47Z","title_canon_sha256":"02c12f6542ac5c3410194fd5e2fdf2b0fbbdce05c260c847c981ff584d99c90d"},"schema_version":"1.0","source":{"id":"1808.06076","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06076","created_at":"2026-05-18T00:07:46Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06076v1","created_at":"2026-05-18T00:07:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06076","created_at":"2026-05-18T00:07:46Z"},{"alias_kind":"pith_short_12","alias_value":"4K5TUFPHKDHC","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4K5TUFPHKDHC3AKQ","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4K5TUFPH","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:0e582ca0754c6e3b64c6af8667b3a8e55c9c48dd40e0335af866dac69aa88fab","target":"graph","created_at":"2026-05-18T00:07:46Z","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":"We investigated SrFeO$_{3-x}$ thin films on a SrTiO$_3$ (001) substrate prepared via pulsed laser epitaxy using an optical spectroscopy technique. The oxygen vacancy level ($x$) was controlled by post-annealing processes at different oxygen partial pressures. We achieved a brownmillerite(BM) structure at $x =$ 0.5 and observed the evolution of the crystal structure from BM into perovskite(PV) as the oxygen concentration increased. We observed the evolution of infrared-active phonons with respect to the oxygen concentration, which was closely related to the structural evolution observed via X-r","authors_text":"A. Glamazda, Amit Khare, Jungseek Hwang, K.-Y. Choi, Myounghoon Lee, Seokbae Lee, Seulki Roh, Sungmin Woo, Taesup Yoo, Woo Seok Choi, Yu-Seong Seo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-18T11:58:47Z","title":"Oxygen vacancy-induced structural evolution of SrFeO$_{3-x}$ epitaxial thin film from brownmillerite to perovskite"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06076","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:f4ede8b6a684a80ff522601ceb6c02f6c73d045012f4df6b1942b2e9b88c2edb","target":"record","created_at":"2026-05-18T00:07:46Z","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":"854cba9e14c3b21a33dcba52d759c510f1dca93499ee8cdefed026c4cc9c856b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-18T11:58:47Z","title_canon_sha256":"02c12f6542ac5c3410194fd5e2fdf2b0fbbdce05c260c847c981ff584d99c90d"},"schema_version":"1.0","source":{"id":"1808.06076","kind":"arxiv","version":1}},"canonical_sha256":"e2bb3a15e750ce2d8150d88e928eedc87c85ae1757587390c37577e4df3f53b9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e2bb3a15e750ce2d8150d88e928eedc87c85ae1757587390c37577e4df3f53b9","first_computed_at":"2026-05-18T00:07:46.180792Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:46.180792Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AoDwS/zDTl4Mzq5tYJwSaRGiHIVtRp9dA8McCWfsj4puD8rRcPKbkyC/AuzRZ1W+KholFujktPnBje7B/ZusCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:46.181444Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.06076","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f4ede8b6a684a80ff522601ceb6c02f6c73d045012f4df6b1942b2e9b88c2edb","sha256:0e582ca0754c6e3b64c6af8667b3a8e55c9c48dd40e0335af866dac69aa88fab"],"state_sha256":"8e81a80c8da45d1113608835074618de17625f904edc2015ee636b3d65c229e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tLyE0HNvo3A0U3THRAvQPKjKw5ZfKbjE/X/vK0pZajkirirCyx/m2M12Ir0oZtUoblwITPlIGUOECVQVMGalDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T00:34:13.381479Z","bundle_sha256":"65483ed9cc06e1900de98939dd53041bbd9ce2178a688d1eadb13791fd580a82"}}