{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:D3YMCX2YOZUSODX4ABOK2DHHSC","short_pith_number":"pith:D3YMCX2Y","canonical_record":{"source":{"id":"1409.4753","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-09-15T22:55:24Z","cross_cats_sorted":[],"title_canon_sha256":"f0f9db6427f5145e6f1184ced28ba606dd82eafffb132c4f5844f732e3dad915","abstract_canon_sha256":"25c22e15bb09579c1f98f1f8e4aa42dd0f248cc49ea66edf72e8981ca616421a"},"schema_version":"1.0"},"canonical_sha256":"1ef0c15f587669270efc005cad0ce79099b2ea6bee1a04a221ceb0582563fb88","source":{"kind":"arxiv","id":"1409.4753","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.4753","created_at":"2026-05-18T02:27:58Z"},{"alias_kind":"arxiv_version","alias_value":"1409.4753v2","created_at":"2026-05-18T02:27:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.4753","created_at":"2026-05-18T02:27:58Z"},{"alias_kind":"pith_short_12","alias_value":"D3YMCX2YOZUS","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"D3YMCX2YOZUSODX4","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"D3YMCX2Y","created_at":"2026-05-18T12:28:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:D3YMCX2YOZUSODX4ABOK2DHHSC","target":"record","payload":{"canonical_record":{"source":{"id":"1409.4753","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-09-15T22:55:24Z","cross_cats_sorted":[],"title_canon_sha256":"f0f9db6427f5145e6f1184ced28ba606dd82eafffb132c4f5844f732e3dad915","abstract_canon_sha256":"25c22e15bb09579c1f98f1f8e4aa42dd0f248cc49ea66edf72e8981ca616421a"},"schema_version":"1.0"},"canonical_sha256":"1ef0c15f587669270efc005cad0ce79099b2ea6bee1a04a221ceb0582563fb88","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:27:58.534616Z","signature_b64":"OiPvws01VT23svXzzcLs7m1VkkwozZPDUqgnfFrsGEgPtN60o/HOuPbA9URX085eTelcCagZlHc7RZO+rEkVCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1ef0c15f587669270efc005cad0ce79099b2ea6bee1a04a221ceb0582563fb88","last_reissued_at":"2026-05-18T02:27:58.534111Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:27:58.534111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1409.4753","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:27:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rmlH06k8SYNzk+kipLb7vtlGkZOP9QGrFybF5P4EECQQTejZqywVoObd+4tfa+cY3XbjGZ185hWpQDFIRHnKCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T10:25:22.251363Z"},"content_sha256":"a3b99aebf0955ce3c0db9bb633ee93890314db7278860f0d1adde885c29121ca","schema_version":"1.0","event_id":"sha256:a3b99aebf0955ce3c0db9bb633ee93890314db7278860f0d1adde885c29121ca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:D3YMCX2YOZUSODX4ABOK2DHHSC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical Properties of Organometallic Perovskite: An ab initio Study using Relativistic GW Correction and Bethe-Salpeter Equation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"C. La-O-Vorakiat, Elbert E. M. Chia, Jian-Xin Zhu, Towfiq Ahmed, T. Salim, Y. M. Lam","submitted_at":"2014-09-15T22:55:24Z","abstract_excerpt":"In the development of highly efficient photovoltaic cells, solid perovskite systems have demonstrated unprecedented promise, with the figure of merit exceeding nineteen percent of efficiency. In this paper, we investigate the optical and vibrational properties of organometallic cubic perovskite CH3NH3PbI3 using first-principles calculations. For accurate theoretical description, we go beyond conventional density functional theory (DFT), and calculated optical conductivity using relativist quasi-particle (GW) correction. Incorporating these many-body effects, we further solve Bethe-Salpeter equ"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.4753","kind":"arxiv","version":2},"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":"2026-05-18T02:27:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uq23it9CJJdLFXU6NUYfb03VhJiWHAaNcr11Cx6zLlQM+BuzDQJas7+0ehv0dx5zjvYjpDBfOzf15kJ2P3gwAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T10:25:22.251722Z"},"content_sha256":"cbfc6a9d084cc771e2881ac3b3379b176704a80fb7673414af4284775408156c","schema_version":"1.0","event_id":"sha256:cbfc6a9d084cc771e2881ac3b3379b176704a80fb7673414af4284775408156c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D3YMCX2YOZUSODX4ABOK2DHHSC/bundle.json","state_url":"https://pith.science/pith/D3YMCX2YOZUSODX4ABOK2DHHSC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D3YMCX2YOZUSODX4ABOK2DHHSC/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":"2026-05-28T10:25:22Z","links":{"resolver":"https://pith.science/pith/D3YMCX2YOZUSODX4ABOK2DHHSC","bundle":"https://pith.science/pith/D3YMCX2YOZUSODX4ABOK2DHHSC/bundle.json","state":"https://pith.science/pith/D3YMCX2YOZUSODX4ABOK2DHHSC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D3YMCX2YOZUSODX4ABOK2DHHSC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:D3YMCX2YOZUSODX4ABOK2DHHSC","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":"25c22e15bb09579c1f98f1f8e4aa42dd0f248cc49ea66edf72e8981ca616421a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-09-15T22:55:24Z","title_canon_sha256":"f0f9db6427f5145e6f1184ced28ba606dd82eafffb132c4f5844f732e3dad915"},"schema_version":"1.0","source":{"id":"1409.4753","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.4753","created_at":"2026-05-18T02:27:58Z"},{"alias_kind":"arxiv_version","alias_value":"1409.4753v2","created_at":"2026-05-18T02:27:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.4753","created_at":"2026-05-18T02:27:58Z"},{"alias_kind":"pith_short_12","alias_value":"D3YMCX2YOZUS","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"D3YMCX2YOZUSODX4","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"D3YMCX2Y","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:cbfc6a9d084cc771e2881ac3b3379b176704a80fb7673414af4284775408156c","target":"graph","created_at":"2026-05-18T02:27:58Z","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":"In the development of highly efficient photovoltaic cells, solid perovskite systems have demonstrated unprecedented promise, with the figure of merit exceeding nineteen percent of efficiency. In this paper, we investigate the optical and vibrational properties of organometallic cubic perovskite CH3NH3PbI3 using first-principles calculations. For accurate theoretical description, we go beyond conventional density functional theory (DFT), and calculated optical conductivity using relativist quasi-particle (GW) correction. Incorporating these many-body effects, we further solve Bethe-Salpeter equ","authors_text":"C. La-O-Vorakiat, Elbert E. M. Chia, Jian-Xin Zhu, Towfiq Ahmed, T. Salim, Y. M. Lam","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-09-15T22:55:24Z","title":"Optical Properties of Organometallic Perovskite: An ab initio Study using Relativistic GW Correction and Bethe-Salpeter Equation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.4753","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:a3b99aebf0955ce3c0db9bb633ee93890314db7278860f0d1adde885c29121ca","target":"record","created_at":"2026-05-18T02:27:58Z","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":"25c22e15bb09579c1f98f1f8e4aa42dd0f248cc49ea66edf72e8981ca616421a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-09-15T22:55:24Z","title_canon_sha256":"f0f9db6427f5145e6f1184ced28ba606dd82eafffb132c4f5844f732e3dad915"},"schema_version":"1.0","source":{"id":"1409.4753","kind":"arxiv","version":2}},"canonical_sha256":"1ef0c15f587669270efc005cad0ce79099b2ea6bee1a04a221ceb0582563fb88","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1ef0c15f587669270efc005cad0ce79099b2ea6bee1a04a221ceb0582563fb88","first_computed_at":"2026-05-18T02:27:58.534111Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:27:58.534111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OiPvws01VT23svXzzcLs7m1VkkwozZPDUqgnfFrsGEgPtN60o/HOuPbA9URX085eTelcCagZlHc7RZO+rEkVCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:27:58.534616Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.4753","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a3b99aebf0955ce3c0db9bb633ee93890314db7278860f0d1adde885c29121ca","sha256:cbfc6a9d084cc771e2881ac3b3379b176704a80fb7673414af4284775408156c"],"state_sha256":"67d26955b6c567e8a72a339beaa6f2b176df45264083e94c82cf685c1ef3ad83"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dbnFMu0EAIcmShWDJjrXGNpFqZdlIUhVxEw2uSkyK2qgj1JOsyqS3qUyp+EPPisjatebzlUsz+CJLxniYSUkBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T10:25:22.253808Z","bundle_sha256":"4bc7743babc40b9002e3012318c5a585ba116fa00c035f77708fb6d797fb7972"}}