{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:G55JUU2QXARRVL6V2UB3ILJ5DT","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":"fad6941554df360e19c8d2cd6ee6b68a2933fd9f068fd0e078c9383654f6a296","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-01-24T14:22:07Z","title_canon_sha256":"fa3db9f407f2fe1533ecc291b5ba015770b38e193c0149d39c90183f5bbbeedc"},"schema_version":"1.0","source":{"id":"2401.13477","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2401.13477","created_at":"2026-07-05T07:37:06Z"},{"alias_kind":"arxiv_version","alias_value":"2401.13477v1","created_at":"2026-07-05T07:37:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2401.13477","created_at":"2026-07-05T07:37:06Z"},{"alias_kind":"pith_short_12","alias_value":"G55JUU2QXARR","created_at":"2026-07-05T07:37:06Z"},{"alias_kind":"pith_short_16","alias_value":"G55JUU2QXARRVL6V","created_at":"2026-07-05T07:37:06Z"},{"alias_kind":"pith_short_8","alias_value":"G55JUU2Q","created_at":"2026-07-05T07:37:06Z"}],"graph_snapshots":[{"event_id":"sha256:df4967c017eba5617c6298d7639e3ada8c99e1aef9c4952d8fc02f351e498ad2","target":"graph","created_at":"2026-07-05T07:37:06Z","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/2401.13477/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this work, we report diffuse reflectivity measurements in InNbO4, ScNbO4, YNbO4, and eight different rare-earth niobates. From a comparison with the established values of the band gap of InNbO4 and ScNbO4, we have found that the broadly used Tauc plot analysis leads to erroneous estimates of the band-gap energy of niobates. In contrast, accurate results are obtained considering excitonic contributions using the Elliot-Toyozawa model. We have found that YNbO4 and the rare-earth niobates are wide band-gap materials. The band-gap energy is 3.25 eV for CeNbO4, 4.35 eV for LaNbO4, 4.5 eV for YNb","authors_text":"Alfonso Munoz, Alfredo Segura, Alka B. Garg, Daniel Errandonea, David Vie, Placida Rodriguez-Hernandez","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-01-24T14:22:07Z","title":"Accurate Determination of the Band-Gap Energy of the Rare-Earth Niobate Series"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2401.13477","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:cfb96c866154c64c1eac3a6e73bb8be9374b955b11b11f6766797eac22705c8b","target":"record","created_at":"2026-07-05T07:37:06Z","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":"fad6941554df360e19c8d2cd6ee6b68a2933fd9f068fd0e078c9383654f6a296","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-01-24T14:22:07Z","title_canon_sha256":"fa3db9f407f2fe1533ecc291b5ba015770b38e193c0149d39c90183f5bbbeedc"},"schema_version":"1.0","source":{"id":"2401.13477","kind":"arxiv","version":1}},"canonical_sha256":"377a9a5350b8231aafd5d503b42d3d1cfe49e89e5edaac61c98eec6ea1bb3957","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"377a9a5350b8231aafd5d503b42d3d1cfe49e89e5edaac61c98eec6ea1bb3957","first_computed_at":"2026-07-05T07:37:06.153515Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:37:06.153515Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nIvZpx5GIGw3vlAVLthakvsar6O5OYzNu7NCX4mXeg0q6+C5BIHiYvHGGsU44jes+QcfnZ9m+QwZ23cQhAfKBA==","signature_status":"signed_v1","signed_at":"2026-07-05T07:37:06.153903Z","signed_message":"canonical_sha256_bytes"},"source_id":"2401.13477","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cfb96c866154c64c1eac3a6e73bb8be9374b955b11b11f6766797eac22705c8b","sha256:df4967c017eba5617c6298d7639e3ada8c99e1aef9c4952d8fc02f351e498ad2"],"state_sha256":"4c36660643cf54e92eb986aee86207c830d0bf215324822d46f8fd2982fbaea0"}