{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:DINFDMER7NYVB57HYJUH2RTBTJ","short_pith_number":"pith:DINFDMER","canonical_record":{"source":{"id":"1503.07328","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-03-25T10:46:50Z","cross_cats_sorted":[],"title_canon_sha256":"080b0d96ef0386cd5316f60b74fd91a60fd3ea146af005fc3b4e02a330f3b442","abstract_canon_sha256":"85d01998fb9792b261e7dfea878cdc5708f807f7a8c3ff5b153afb9f29db563d"},"schema_version":"1.0"},"canonical_sha256":"1a1a51b091fb7150f7e7c2687d46619a470c33aefe5a32b7c91dd1ebc91df557","source":{"kind":"arxiv","id":"1503.07328","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.07328","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"arxiv_version","alias_value":"1503.07328v1","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07328","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"pith_short_12","alias_value":"DINFDMER7NYV","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DINFDMER7NYVB57H","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DINFDMER","created_at":"2026-05-18T12:29:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:DINFDMER7NYVB57HYJUH2RTBTJ","target":"record","payload":{"canonical_record":{"source":{"id":"1503.07328","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-03-25T10:46:50Z","cross_cats_sorted":[],"title_canon_sha256":"080b0d96ef0386cd5316f60b74fd91a60fd3ea146af005fc3b4e02a330f3b442","abstract_canon_sha256":"85d01998fb9792b261e7dfea878cdc5708f807f7a8c3ff5b153afb9f29db563d"},"schema_version":"1.0"},"canonical_sha256":"1a1a51b091fb7150f7e7c2687d46619a470c33aefe5a32b7c91dd1ebc91df557","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:49.907883Z","signature_b64":"1sBtw1EY3dfPathvLLmUSP7YUutggdArKL/HZ3TDIfY+qYMW0R1kph2xkX8MhTqBqy0ABdn2fZF6Ch79EJizAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a1a51b091fb7150f7e7c2687d46619a470c33aefe5a32b7c91dd1ebc91df557","last_reissued_at":"2026-05-18T01:40:49.907212Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:49.907212Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.07328","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":"2026-05-18T01:40:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g1GfK7Fg9FADU6PNVIwviR4Jw2aMvylB7ZcChWg3Lix60yHleS7NpnmD7POcX4mvmTby9PC+ZrvSmafNrINPDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T22:33:29.959170Z"},"content_sha256":"75d53c1123900478a2452b2afa915789ae0670ece6800f95768d440090ec2b4f","schema_version":"1.0","event_id":"sha256:75d53c1123900478a2452b2afa915789ae0670ece6800f95768d440090ec2b4f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:DINFDMER7NYVB57HYJUH2RTBTJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectral weight redistribution in (LaNiO3)n/(LaMnO3)2 superlattices from optical spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"A. Bhattacharya, A. Perucchi, J. Hoffman, P. Di Pietro, S. Lupi","submitted_at":"2015-03-25T10:46:50Z","abstract_excerpt":"We have studied the optical properties of four (LaNiO$_3$)$_n$/(LaMnO$_3$)$_2$ superlattices (SL) ($n$=2, 3, 4, 5) on SrTiO$_3$ substrates. We have measured the reflectivity at temperatures from 20 K to 400 K, and extracted the optical conductivity through a fitting procedure based on a Kramers-Kronig consistent Lorentz-Drude model. With increasing LaNiO$_3$ thickness, the SLs undergo an insulator-to-metal transition (IMT) that is accompanied by the transfer of spectral weight from high to low frequency. The presence of a broad mid-infrared band, however, shows that the optical conductivity of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07328","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":"2026-05-18T01:40:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HbKvWG0+oteaiQO/bDdsuEUpw7EypxUaLsXAYWl8OR9mQ5WXTOoneFBRQdf6Vx6kXdSt8BBKcraMpNGKXoBmDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T22:33:29.959845Z"},"content_sha256":"dd7f736ec0532cae1e52690e866eb3d2f0e973b72a7db866ea4e7d37b1ba08f3","schema_version":"1.0","event_id":"sha256:dd7f736ec0532cae1e52690e866eb3d2f0e973b72a7db866ea4e7d37b1ba08f3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DINFDMER7NYVB57HYJUH2RTBTJ/bundle.json","state_url":"https://pith.science/pith/DINFDMER7NYVB57HYJUH2RTBTJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DINFDMER7NYVB57HYJUH2RTBTJ/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":"2026-05-26T22:33:29Z","links":{"resolver":"https://pith.science/pith/DINFDMER7NYVB57HYJUH2RTBTJ","bundle":"https://pith.science/pith/DINFDMER7NYVB57HYJUH2RTBTJ/bundle.json","state":"https://pith.science/pith/DINFDMER7NYVB57HYJUH2RTBTJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DINFDMER7NYVB57HYJUH2RTBTJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:DINFDMER7NYVB57HYJUH2RTBTJ","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":"85d01998fb9792b261e7dfea878cdc5708f807f7a8c3ff5b153afb9f29db563d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-03-25T10:46:50Z","title_canon_sha256":"080b0d96ef0386cd5316f60b74fd91a60fd3ea146af005fc3b4e02a330f3b442"},"schema_version":"1.0","source":{"id":"1503.07328","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.07328","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"arxiv_version","alias_value":"1503.07328v1","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07328","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"pith_short_12","alias_value":"DINFDMER7NYV","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DINFDMER7NYVB57H","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DINFDMER","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:dd7f736ec0532cae1e52690e866eb3d2f0e973b72a7db866ea4e7d37b1ba08f3","target":"graph","created_at":"2026-05-18T01:40:49Z","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 have studied the optical properties of four (LaNiO$_3$)$_n$/(LaMnO$_3$)$_2$ superlattices (SL) ($n$=2, 3, 4, 5) on SrTiO$_3$ substrates. We have measured the reflectivity at temperatures from 20 K to 400 K, and extracted the optical conductivity through a fitting procedure based on a Kramers-Kronig consistent Lorentz-Drude model. With increasing LaNiO$_3$ thickness, the SLs undergo an insulator-to-metal transition (IMT) that is accompanied by the transfer of spectral weight from high to low frequency. The presence of a broad mid-infrared band, however, shows that the optical conductivity of","authors_text":"A. Bhattacharya, A. Perucchi, J. Hoffman, P. Di Pietro, S. Lupi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-03-25T10:46:50Z","title":"Spectral weight redistribution in (LaNiO3)n/(LaMnO3)2 superlattices from optical spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07328","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":"sha256:75d53c1123900478a2452b2afa915789ae0670ece6800f95768d440090ec2b4f","target":"record","created_at":"2026-05-18T01:40:49Z","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":"85d01998fb9792b261e7dfea878cdc5708f807f7a8c3ff5b153afb9f29db563d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-03-25T10:46:50Z","title_canon_sha256":"080b0d96ef0386cd5316f60b74fd91a60fd3ea146af005fc3b4e02a330f3b442"},"schema_version":"1.0","source":{"id":"1503.07328","kind":"arxiv","version":1}},"canonical_sha256":"1a1a51b091fb7150f7e7c2687d46619a470c33aefe5a32b7c91dd1ebc91df557","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a1a51b091fb7150f7e7c2687d46619a470c33aefe5a32b7c91dd1ebc91df557","first_computed_at":"2026-05-18T01:40:49.907212Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:49.907212Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1sBtw1EY3dfPathvLLmUSP7YUutggdArKL/HZ3TDIfY+qYMW0R1kph2xkX8MhTqBqy0ABdn2fZF6Ch79EJizAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:49.907883Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.07328","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:75d53c1123900478a2452b2afa915789ae0670ece6800f95768d440090ec2b4f","sha256:dd7f736ec0532cae1e52690e866eb3d2f0e973b72a7db866ea4e7d37b1ba08f3"],"state_sha256":"87caeb9e29d2f971fedd8572af966bdb0a09890a5815c36fec30b4511ea07ed6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AP5bpLX/cSJ/g40YAv6pnMvmjR8MzUmndqi4ABlG/CSbYa+zYT0+9M0vW5h1SfxhpFLJqlX0+goD+2Au721TAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T22:33:29.963674Z","bundle_sha256":"e9bdfd581b0f40bc9773df54402099b30772e959c22af2a73ae85af76b350815"}}