{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:OB425D6EFRLX6LCIZWPPYEPJAH","short_pith_number":"pith:OB425D6E","canonical_record":{"source":{"id":"0805.3884","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-05-26T07:14:44Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"2fe33297c29266a62baa47f75e091fa2278d979097f3bde0009fdbe947979965","abstract_canon_sha256":"0a693c21a030b2efaf0cd14edf881d25e4ba2cd91e7969f45508633261b626e7"},"schema_version":"1.0"},"canonical_sha256":"7079ae8fc42c577f2c48cd9efc11e901f7a83b6ba0794b90c61bbf0b113045cc","source":{"kind":"arxiv","id":"0805.3884","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0805.3884","created_at":"2026-07-04T15:13:43Z"},{"alias_kind":"arxiv_version","alias_value":"0805.3884v1","created_at":"2026-07-04T15:13:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0805.3884","created_at":"2026-07-04T15:13:43Z"},{"alias_kind":"pith_short_12","alias_value":"OB425D6EFRLX","created_at":"2026-07-04T15:13:43Z"},{"alias_kind":"pith_short_16","alias_value":"OB425D6EFRLX6LCI","created_at":"2026-07-04T15:13:43Z"},{"alias_kind":"pith_short_8","alias_value":"OB425D6E","created_at":"2026-07-04T15:13:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:OB425D6EFRLX6LCIZWPPYEPJAH","target":"record","payload":{"canonical_record":{"source":{"id":"0805.3884","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-05-26T07:14:44Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"2fe33297c29266a62baa47f75e091fa2278d979097f3bde0009fdbe947979965","abstract_canon_sha256":"0a693c21a030b2efaf0cd14edf881d25e4ba2cd91e7969f45508633261b626e7"},"schema_version":"1.0"},"canonical_sha256":"7079ae8fc42c577f2c48cd9efc11e901f7a83b6ba0794b90c61bbf0b113045cc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:13:43.280103Z","signature_b64":"TRb1UXa10h0KRMZ2xvnu+SmYiRKNfWo2t60ujJhcX5f810kKINeN4QqFX3ue4DbZeqZIpL6+bjQObsXKnIqzAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7079ae8fc42c577f2c48cd9efc11e901f7a83b6ba0794b90c61bbf0b113045cc","last_reissued_at":"2026-07-04T15:13:43.279696Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:13:43.279696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0805.3884","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":"2026-07-04T15:13:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b/dppj/cEmaPZrSf2+wrAIT7PaBOQ3bN4AukmYWb4OudjphnffC7+x+6NWRFjzIq7paLQCy3LrgnHivd1jINCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T21:55:06.584674Z"},"content_sha256":"19a2bf1c53dabc11ec78f7fc56c7a2a1447381063d5fd0654269b401e13db3ac","schema_version":"1.0","event_id":"sha256:19a2bf1c53dabc11ec78f7fc56c7a2a1447381063d5fd0654269b401e13db3ac"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:OB425D6EFRLX6LCIZWPPYEPJAH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Resonant Raman of OH/OD vibrations and photoluminescence studies in LiTaO3 thin film","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"B. N. Raja Sekhar, P. K. Gupta, Shailendra Kumar, S. Satapathy, V. G. Sathe","submitted_at":"2008-05-26T07:14:44Z","abstract_excerpt":"Resonant Raman spectra (RRS) of O-H and O-D vibration and libration modes, their combinations and higher harmonics have been observed in LiTaO3 polycrystalline thin films. RRS peaks are superimposed on photoluminescence (PL) spectrum. Monochromatic light from a xenon lamp is used as excitation source. PL spectrum shows two broad peaks, first near the band gap in UV (4.4-4.8eV) and another in the sub band gap region (< 4.0 eV). Band gap PL along with RRS peaks are reported for the first time. Photoluminescence excitation spectrum (PLE) shows a peak at 4.8 eV. Peak positions and full width at ha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0805.3884","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0805.3884/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:13:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O4QABrKTDzD43vZWrsYBSEm4z2+E6DPKY8gOAkLMzm+eAvghv7cJD01K2p9CptkMFrKaCnPQMUUuDii2qE00BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T21:55:06.585008Z"},"content_sha256":"e81f5e640a3bf76a00617d20f9a0bd01e1daa593114a02ba92cadd636ac2f349","schema_version":"1.0","event_id":"sha256:e81f5e640a3bf76a00617d20f9a0bd01e1daa593114a02ba92cadd636ac2f349"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OB425D6EFRLX6LCIZWPPYEPJAH/bundle.json","state_url":"https://pith.science/pith/OB425D6EFRLX6LCIZWPPYEPJAH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OB425D6EFRLX6LCIZWPPYEPJAH/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":"2026-08-06T21:55:06Z","links":{"resolver":"https://pith.science/pith/OB425D6EFRLX6LCIZWPPYEPJAH","bundle":"https://pith.science/pith/OB425D6EFRLX6LCIZWPPYEPJAH/bundle.json","state":"https://pith.science/pith/OB425D6EFRLX6LCIZWPPYEPJAH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OB425D6EFRLX6LCIZWPPYEPJAH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:OB425D6EFRLX6LCIZWPPYEPJAH","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":"0a693c21a030b2efaf0cd14edf881d25e4ba2cd91e7969f45508633261b626e7","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-05-26T07:14:44Z","title_canon_sha256":"2fe33297c29266a62baa47f75e091fa2278d979097f3bde0009fdbe947979965"},"schema_version":"1.0","source":{"id":"0805.3884","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0805.3884","created_at":"2026-07-04T15:13:43Z"},{"alias_kind":"arxiv_version","alias_value":"0805.3884v1","created_at":"2026-07-04T15:13:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0805.3884","created_at":"2026-07-04T15:13:43Z"},{"alias_kind":"pith_short_12","alias_value":"OB425D6EFRLX","created_at":"2026-07-04T15:13:43Z"},{"alias_kind":"pith_short_16","alias_value":"OB425D6EFRLX6LCI","created_at":"2026-07-04T15:13:43Z"},{"alias_kind":"pith_short_8","alias_value":"OB425D6E","created_at":"2026-07-04T15:13:43Z"}],"graph_snapshots":[{"event_id":"sha256:e81f5e640a3bf76a00617d20f9a0bd01e1daa593114a02ba92cadd636ac2f349","target":"graph","created_at":"2026-07-04T15:13:43Z","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/0805.3884/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Resonant Raman spectra (RRS) of O-H and O-D vibration and libration modes, their combinations and higher harmonics have been observed in LiTaO3 polycrystalline thin films. RRS peaks are superimposed on photoluminescence (PL) spectrum. Monochromatic light from a xenon lamp is used as excitation source. PL spectrum shows two broad peaks, first near the band gap in UV (4.4-4.8eV) and another in the sub band gap region (< 4.0 eV). Band gap PL along with RRS peaks are reported for the first time. Photoluminescence excitation spectrum (PLE) shows a peak at 4.8 eV. Peak positions and full width at ha","authors_text":"B. N. Raja Sekhar, P. K. Gupta, Shailendra Kumar, S. Satapathy, V. G. Sathe","cross_cats":["cond-mat.other"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-05-26T07:14:44Z","title":"Resonant Raman of OH/OD vibrations and photoluminescence studies in LiTaO3 thin film"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0805.3884","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":"sha256:19a2bf1c53dabc11ec78f7fc56c7a2a1447381063d5fd0654269b401e13db3ac","target":"record","created_at":"2026-07-04T15:13:43Z","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":"0a693c21a030b2efaf0cd14edf881d25e4ba2cd91e7969f45508633261b626e7","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-05-26T07:14:44Z","title_canon_sha256":"2fe33297c29266a62baa47f75e091fa2278d979097f3bde0009fdbe947979965"},"schema_version":"1.0","source":{"id":"0805.3884","kind":"arxiv","version":1}},"canonical_sha256":"7079ae8fc42c577f2c48cd9efc11e901f7a83b6ba0794b90c61bbf0b113045cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7079ae8fc42c577f2c48cd9efc11e901f7a83b6ba0794b90c61bbf0b113045cc","first_computed_at":"2026-07-04T15:13:43.279696Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:13:43.279696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TRb1UXa10h0KRMZ2xvnu+SmYiRKNfWo2t60ujJhcX5f810kKINeN4QqFX3ue4DbZeqZIpL6+bjQObsXKnIqzAA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:13:43.280103Z","signed_message":"canonical_sha256_bytes"},"source_id":"0805.3884","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:19a2bf1c53dabc11ec78f7fc56c7a2a1447381063d5fd0654269b401e13db3ac","sha256:e81f5e640a3bf76a00617d20f9a0bd01e1daa593114a02ba92cadd636ac2f349"],"state_sha256":"8383ca1822692ae2751ae08a7434fbd5d464496e7d244e6cd8165df9ca87ba48"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J89fd49LILuQsV+xpsOvuHlaQf7i3f1sUqmvKjrRt/GCKkoFBk+AKzXK0OPX7GvlO2Km4FN4iUxUjvL+4CrbAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T21:55:06.588131Z","bundle_sha256":"b7b2a0961edb9a3583328985b4fafb4fbbbd5e2f8a9f7d3a1269ff61ba7b7e6f"}}