{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:BUCZFJ5LR75YMYLVSEQJ5AHBS3","short_pith_number":"pith:BUCZFJ5L","canonical_record":{"source":{"id":"1309.4056","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-09-16T18:14:21Z","cross_cats_sorted":[],"title_canon_sha256":"79f74d606100498489a8fa8e010553974459b405f2082892bbe9931237782ebe","abstract_canon_sha256":"2033d5b9d6c1d0ca8c3e062021d54b5cb428bf271ed6df403d5fae3d7ae3ed62"},"schema_version":"1.0"},"canonical_sha256":"0d0592a7ab8ffb86617591209e80e196d667e2114f9bdbaa136226e741960473","source":{"kind":"arxiv","id":"1309.4056","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.4056","created_at":"2026-05-18T01:47:37Z"},{"alias_kind":"arxiv_version","alias_value":"1309.4056v1","created_at":"2026-05-18T01:47:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.4056","created_at":"2026-05-18T01:47:37Z"},{"alias_kind":"pith_short_12","alias_value":"BUCZFJ5LR75Y","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"BUCZFJ5LR75YMYLV","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"BUCZFJ5L","created_at":"2026-05-18T12:27:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:BUCZFJ5LR75YMYLVSEQJ5AHBS3","target":"record","payload":{"canonical_record":{"source":{"id":"1309.4056","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-09-16T18:14:21Z","cross_cats_sorted":[],"title_canon_sha256":"79f74d606100498489a8fa8e010553974459b405f2082892bbe9931237782ebe","abstract_canon_sha256":"2033d5b9d6c1d0ca8c3e062021d54b5cb428bf271ed6df403d5fae3d7ae3ed62"},"schema_version":"1.0"},"canonical_sha256":"0d0592a7ab8ffb86617591209e80e196d667e2114f9bdbaa136226e741960473","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:37.139006Z","signature_b64":"JeBk228ueyImVMhXy4CHGA6aFeR/TuFDhBZ588nsGgibPEfpg1YXTa6o3Dp7UxfPlPtN1qtQjrFdI9L+gIY3DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0d0592a7ab8ffb86617591209e80e196d667e2114f9bdbaa136226e741960473","last_reissued_at":"2026-05-18T01:47:37.138519Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:37.138519Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.4056","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":"2026-05-18T01:47:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U/RWnXY1P8u7b5jegPm8J/6FCjxH42LrzhbMrBNSqAU1KQTtMsa9P5W9gAx4CDORKS0EdiUysxJkGulnc78SBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T17:32:24.040157Z"},"content_sha256":"8a4379cb796e7d5a5bf78b8a9dba6c5fb3236a055e6d6a609111037045644daf","schema_version":"1.0","event_id":"sha256:8a4379cb796e7d5a5bf78b8a9dba6c5fb3236a055e6d6a609111037045644daf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:BUCZFJ5LR75YMYLVSEQJ5AHBS3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical Anisotropy in Bismuth Titanate: An Experimental and Theoretical Study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Amritendu Roy, Ashish Garg, Rajendra Prasad, Sushil Auluck","submitted_at":"2013-09-16T18:14:21Z","abstract_excerpt":"We report experimental and theoretical investigation of anisotropy in optical properties and their origin in the ferroelectric and paraelectric phases of bismuth titanate. Room temperature ellipsometric measurements performed on pulsed laser deposited bismuth titanate thin films of different orientations show anisotropy in the dielectric and optical constants, Subsequent first-principles calculations performed on the ground state structures of ferroelectric and high temperature paraelectric phases of bismuth titanate show that the material demonstrates anisotropic optical behavior in both ferr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4056","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":"2026-05-18T01:47:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q5in1iLPOxhyXIiCemq+jHtmoTT25CFmb+ARv0VLlO4qa1tW6nyqr1MPD5iGs7DdRWkZBV3Y/x5xZMgbSVbDAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T17:32:24.040531Z"},"content_sha256":"0f834c0737c8b90a7f635a854878a23233f52d8f31689a25af5e47952d2bd6e2","schema_version":"1.0","event_id":"sha256:0f834c0737c8b90a7f635a854878a23233f52d8f31689a25af5e47952d2bd6e2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BUCZFJ5LR75YMYLVSEQJ5AHBS3/bundle.json","state_url":"https://pith.science/pith/BUCZFJ5LR75YMYLVSEQJ5AHBS3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BUCZFJ5LR75YMYLVSEQJ5AHBS3/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":"2026-06-23T17:32:24Z","links":{"resolver":"https://pith.science/pith/BUCZFJ5LR75YMYLVSEQJ5AHBS3","bundle":"https://pith.science/pith/BUCZFJ5LR75YMYLVSEQJ5AHBS3/bundle.json","state":"https://pith.science/pith/BUCZFJ5LR75YMYLVSEQJ5AHBS3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BUCZFJ5LR75YMYLVSEQJ5AHBS3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:BUCZFJ5LR75YMYLVSEQJ5AHBS3","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":"2033d5b9d6c1d0ca8c3e062021d54b5cb428bf271ed6df403d5fae3d7ae3ed62","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-09-16T18:14:21Z","title_canon_sha256":"79f74d606100498489a8fa8e010553974459b405f2082892bbe9931237782ebe"},"schema_version":"1.0","source":{"id":"1309.4056","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.4056","created_at":"2026-05-18T01:47:37Z"},{"alias_kind":"arxiv_version","alias_value":"1309.4056v1","created_at":"2026-05-18T01:47:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.4056","created_at":"2026-05-18T01:47:37Z"},{"alias_kind":"pith_short_12","alias_value":"BUCZFJ5LR75Y","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"BUCZFJ5LR75YMYLV","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"BUCZFJ5L","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:0f834c0737c8b90a7f635a854878a23233f52d8f31689a25af5e47952d2bd6e2","target":"graph","created_at":"2026-05-18T01:47:37Z","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 report experimental and theoretical investigation of anisotropy in optical properties and their origin in the ferroelectric and paraelectric phases of bismuth titanate. Room temperature ellipsometric measurements performed on pulsed laser deposited bismuth titanate thin films of different orientations show anisotropy in the dielectric and optical constants, Subsequent first-principles calculations performed on the ground state structures of ferroelectric and high temperature paraelectric phases of bismuth titanate show that the material demonstrates anisotropic optical behavior in both ferr","authors_text":"Amritendu Roy, Ashish Garg, Rajendra Prasad, Sushil Auluck","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-09-16T18:14:21Z","title":"Optical Anisotropy in Bismuth Titanate: An Experimental and Theoretical Study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4056","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":"sha256:8a4379cb796e7d5a5bf78b8a9dba6c5fb3236a055e6d6a609111037045644daf","target":"record","created_at":"2026-05-18T01:47:37Z","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":"2033d5b9d6c1d0ca8c3e062021d54b5cb428bf271ed6df403d5fae3d7ae3ed62","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-09-16T18:14:21Z","title_canon_sha256":"79f74d606100498489a8fa8e010553974459b405f2082892bbe9931237782ebe"},"schema_version":"1.0","source":{"id":"1309.4056","kind":"arxiv","version":1}},"canonical_sha256":"0d0592a7ab8ffb86617591209e80e196d667e2114f9bdbaa136226e741960473","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0d0592a7ab8ffb86617591209e80e196d667e2114f9bdbaa136226e741960473","first_computed_at":"2026-05-18T01:47:37.138519Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:37.138519Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JeBk228ueyImVMhXy4CHGA6aFeR/TuFDhBZ588nsGgibPEfpg1YXTa6o3Dp7UxfPlPtN1qtQjrFdI9L+gIY3DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:37.139006Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.4056","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8a4379cb796e7d5a5bf78b8a9dba6c5fb3236a055e6d6a609111037045644daf","sha256:0f834c0737c8b90a7f635a854878a23233f52d8f31689a25af5e47952d2bd6e2"],"state_sha256":"452b8732b1e7eaff40c50a911f8d50c2ad4a898c3f5810d8aaa91a3e47c561f0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EDA4aoLOZ+250dlC392fFSdDCQtGpRaUyE7Qk1bwBNJRIOTF9S7MKLuSG415jymQ1q2Bk1/9vvNOUCbwxXg4Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T17:32:24.042427Z","bundle_sha256":"0b215c81b35962daaaa571d13639f14a75ffb704d04bf08215f1cc3a394fce5e"}}