{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:342ZSMBPRXMEJ36JYX57VPRH6S","short_pith_number":"pith:342ZSMBP","canonical_record":{"source":{"id":"2502.04624","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-02-07T02:51:23Z","cross_cats_sorted":[],"title_canon_sha256":"661e76f293ac1a2e8f44a93cd078d897469e0a951e59847ff74567f1e55d327c","abstract_canon_sha256":"fdd6e44204037053c5ba40b4ed4cfd052b3752a6d585f26ef95eb69dc026f532"},"schema_version":"1.0"},"canonical_sha256":"df3599302f8dd844efc9c5fbfabe27f4bf48a21467de1c889afae9c099d2a7ef","source":{"kind":"arxiv","id":"2502.04624","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.04624","created_at":"2026-07-05T10:18:49Z"},{"alias_kind":"arxiv_version","alias_value":"2502.04624v2","created_at":"2026-07-05T10:18:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.04624","created_at":"2026-07-05T10:18:49Z"},{"alias_kind":"pith_short_12","alias_value":"342ZSMBPRXME","created_at":"2026-07-05T10:18:49Z"},{"alias_kind":"pith_short_16","alias_value":"342ZSMBPRXMEJ36J","created_at":"2026-07-05T10:18:49Z"},{"alias_kind":"pith_short_8","alias_value":"342ZSMBP","created_at":"2026-07-05T10:18:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:342ZSMBPRXMEJ36JYX57VPRH6S","target":"record","payload":{"canonical_record":{"source":{"id":"2502.04624","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-02-07T02:51:23Z","cross_cats_sorted":[],"title_canon_sha256":"661e76f293ac1a2e8f44a93cd078d897469e0a951e59847ff74567f1e55d327c","abstract_canon_sha256":"fdd6e44204037053c5ba40b4ed4cfd052b3752a6d585f26ef95eb69dc026f532"},"schema_version":"1.0"},"canonical_sha256":"df3599302f8dd844efc9c5fbfabe27f4bf48a21467de1c889afae9c099d2a7ef","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:18:49.492803Z","signature_b64":"dBLo8v+bHQR5yND2p6l2yuuUK+E5tx14mtzwpVe7MkckDv7geA4GyaVegVjdWXPzkpQ/lTGKv0s7HQhaYfnYDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"df3599302f8dd844efc9c5fbfabe27f4bf48a21467de1c889afae9c099d2a7ef","last_reissued_at":"2026-07-05T10:18:49.492322Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:18:49.492322Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.04624","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":"2026-07-05T10:18:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/T9TtVlSHpqmq8v2Y05snQ/4SwwdaNJgNHUVWldAiXpxbPNs1jc+2rYuf1ST4Bh947BFmOrFSEJ8NDYiqEJVBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T21:14:34.828774Z"},"content_sha256":"81f40d6a87c75c2d858f22c7f3f8313b84fed16bb82e566869a60e456e8fa1bd","schema_version":"1.0","event_id":"sha256:81f40d6a87c75c2d858f22c7f3f8313b84fed16bb82e566869a60e456e8fa1bd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:342ZSMBPRXMEJ36JYX57VPRH6S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pure momentum-shift bulk photovoltaic effect in ferroelectric flat-band Mott insulators","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Hua Wang, Jingshan Qi, Kai Chang, Zhihao Gong, Zhuocheng Lu","submitted_at":"2025-02-07T02:51:23Z","abstract_excerpt":"The shift current photovoltaic effect is conventionally understood as the real-space displacement of a wave packet induced by photoexcitation. However, this interpretation becomes insufficient in flat-band systems, where quasiparticles are too massive to accelerate in real space under the optical electric field. Here, we developed a physically consistent method to decompose the shift current into real-space and momentum-space components. A surprising pure momentum-space shift current is found theoretically in flat-band Mott insulator Nb$_3$X$_8$ (X = Cl, Br, I) monolayers. This work underscore"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.04624","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2502.04624/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":"2026-07-05T10:18:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dfXsOiFK93JRpiZZRIHhOKWm6J2DHS8c7LYyQFiJwycByPD9CHYH3HjRZMYSTL/rdrdkSplCystVfV+c3cnoAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T21:14:34.829287Z"},"content_sha256":"f07757eec8a83a50a1075c5e14056d61c5a7ffd9760c473d0390f29be69d607d","schema_version":"1.0","event_id":"sha256:f07757eec8a83a50a1075c5e14056d61c5a7ffd9760c473d0390f29be69d607d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/342ZSMBPRXMEJ36JYX57VPRH6S/bundle.json","state_url":"https://pith.science/pith/342ZSMBPRXMEJ36JYX57VPRH6S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/342ZSMBPRXMEJ36JYX57VPRH6S/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":"2026-08-08T21:14:34Z","links":{"resolver":"https://pith.science/pith/342ZSMBPRXMEJ36JYX57VPRH6S","bundle":"https://pith.science/pith/342ZSMBPRXMEJ36JYX57VPRH6S/bundle.json","state":"https://pith.science/pith/342ZSMBPRXMEJ36JYX57VPRH6S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/342ZSMBPRXMEJ36JYX57VPRH6S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:342ZSMBPRXMEJ36JYX57VPRH6S","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":"fdd6e44204037053c5ba40b4ed4cfd052b3752a6d585f26ef95eb69dc026f532","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-02-07T02:51:23Z","title_canon_sha256":"661e76f293ac1a2e8f44a93cd078d897469e0a951e59847ff74567f1e55d327c"},"schema_version":"1.0","source":{"id":"2502.04624","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.04624","created_at":"2026-07-05T10:18:49Z"},{"alias_kind":"arxiv_version","alias_value":"2502.04624v2","created_at":"2026-07-05T10:18:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.04624","created_at":"2026-07-05T10:18:49Z"},{"alias_kind":"pith_short_12","alias_value":"342ZSMBPRXME","created_at":"2026-07-05T10:18:49Z"},{"alias_kind":"pith_short_16","alias_value":"342ZSMBPRXMEJ36J","created_at":"2026-07-05T10:18:49Z"},{"alias_kind":"pith_short_8","alias_value":"342ZSMBP","created_at":"2026-07-05T10:18:49Z"}],"graph_snapshots":[{"event_id":"sha256:f07757eec8a83a50a1075c5e14056d61c5a7ffd9760c473d0390f29be69d607d","target":"graph","created_at":"2026-07-05T10:18:49Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2502.04624/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The shift current photovoltaic effect is conventionally understood as the real-space displacement of a wave packet induced by photoexcitation. However, this interpretation becomes insufficient in flat-band systems, where quasiparticles are too massive to accelerate in real space under the optical electric field. Here, we developed a physically consistent method to decompose the shift current into real-space and momentum-space components. A surprising pure momentum-space shift current is found theoretically in flat-band Mott insulator Nb$_3$X$_8$ (X = Cl, Br, I) monolayers. This work underscore","authors_text":"Hua Wang, Jingshan Qi, Kai Chang, Zhihao Gong, Zhuocheng Lu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-02-07T02:51:23Z","title":"Pure momentum-shift bulk photovoltaic effect in ferroelectric flat-band Mott insulators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.04624","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":"sha256:81f40d6a87c75c2d858f22c7f3f8313b84fed16bb82e566869a60e456e8fa1bd","target":"record","created_at":"2026-07-05T10:18:49Z","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":"fdd6e44204037053c5ba40b4ed4cfd052b3752a6d585f26ef95eb69dc026f532","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-02-07T02:51:23Z","title_canon_sha256":"661e76f293ac1a2e8f44a93cd078d897469e0a951e59847ff74567f1e55d327c"},"schema_version":"1.0","source":{"id":"2502.04624","kind":"arxiv","version":2}},"canonical_sha256":"df3599302f8dd844efc9c5fbfabe27f4bf48a21467de1c889afae9c099d2a7ef","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"df3599302f8dd844efc9c5fbfabe27f4bf48a21467de1c889afae9c099d2a7ef","first_computed_at":"2026-07-05T10:18:49.492322Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:18:49.492322Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dBLo8v+bHQR5yND2p6l2yuuUK+E5tx14mtzwpVe7MkckDv7geA4GyaVegVjdWXPzkpQ/lTGKv0s7HQhaYfnYDg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:18:49.492803Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.04624","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:81f40d6a87c75c2d858f22c7f3f8313b84fed16bb82e566869a60e456e8fa1bd","sha256:f07757eec8a83a50a1075c5e14056d61c5a7ffd9760c473d0390f29be69d607d"],"state_sha256":"ee02568afd8f381855d0e46c13bdcdafa5cd5f39acd7ffb78527314c3ff8947d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vBFOg4r1gXklEqxd6PdE2Zz7z5JzvBUBmK978s2XT2O1pe9PTjZaadb91mdzwGF4zwsBQ9Z15ogO3xPnMjgrBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T21:14:34.833002Z","bundle_sha256":"afbbb290c72997f0a740abb1eb3d3106c944dc5ad88bd3f84ec2398b6e40cef2"}}