{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:HALST7VREGT6NMQPOTKONOIJCM","short_pith_number":"pith:HALST7VR","canonical_record":{"source":{"id":"2209.07747","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2022-09-16T07:07:59Z","cross_cats_sorted":[],"title_canon_sha256":"1d3147690d72cfcf82a7d525fba18ad0c86775b93ac69a854df98bd55524a7c4","abstract_canon_sha256":"1af7f95f3910cfebc506664dc142dbec8abab3d6d3ad01d48868f2886708c415"},"schema_version":"1.0"},"canonical_sha256":"381729feb121a7e6b20f74d4e6b909130424b03b42e42bcd8cc43ea5334fe077","source":{"kind":"arxiv","id":"2209.07747","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2209.07747","created_at":"2026-07-05T05:11:42Z"},{"alias_kind":"arxiv_version","alias_value":"2209.07747v1","created_at":"2026-07-05T05:11:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2209.07747","created_at":"2026-07-05T05:11:42Z"},{"alias_kind":"pith_short_12","alias_value":"HALST7VREGT6","created_at":"2026-07-05T05:11:42Z"},{"alias_kind":"pith_short_16","alias_value":"HALST7VREGT6NMQP","created_at":"2026-07-05T05:11:42Z"},{"alias_kind":"pith_short_8","alias_value":"HALST7VR","created_at":"2026-07-05T05:11:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:HALST7VREGT6NMQPOTKONOIJCM","target":"record","payload":{"canonical_record":{"source":{"id":"2209.07747","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2022-09-16T07:07:59Z","cross_cats_sorted":[],"title_canon_sha256":"1d3147690d72cfcf82a7d525fba18ad0c86775b93ac69a854df98bd55524a7c4","abstract_canon_sha256":"1af7f95f3910cfebc506664dc142dbec8abab3d6d3ad01d48868f2886708c415"},"schema_version":"1.0"},"canonical_sha256":"381729feb121a7e6b20f74d4e6b909130424b03b42e42bcd8cc43ea5334fe077","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:11:42.754173Z","signature_b64":"HzhPdDcV/h/e13anFydXxB2p4GtN+1D45o9Z41y8ilRBoPWT4foXUCQIvb6TlGvhDeL92yve0/rSFNvKcwxhAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"381729feb121a7e6b20f74d4e6b909130424b03b42e42bcd8cc43ea5334fe077","last_reissued_at":"2026-07-05T05:11:42.753651Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:11:42.753651Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2209.07747","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":"2026-07-05T05:11:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Xg9/4DHhSDK2NhIdSenPs1r1FdM0Zx/iuJNOtaVrYtNoIjnotcZL7zQvin4TCsw6O5BaCTL7ns1kwsPpM54DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T21:06:37.817312Z"},"content_sha256":"5ef3fcfc2590b3f4f7948bd86645dcc8380f6d22de85fa6c0f95d2a279d158f7","schema_version":"1.0","event_id":"sha256:5ef3fcfc2590b3f4f7948bd86645dcc8380f6d22de85fa6c0f95d2a279d158f7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:HALST7VREGT6NMQPOTKONOIJCM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Localized State-Induced Enhanced Intrinsic Phonon-Free Optical Transition in Silicon Nanocrystals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Feilong Wang, Qiongrong Ou, Shuyu Zhang","submitted_at":"2022-09-16T07:07:59Z","abstract_excerpt":"Silicon photoluminescence and lasing have been critical issues to breakthrough bottlenecks in the understanding of luminescence mechanisms. Unfortunately, long-standing disputes about the exciton recombination mechanism and fluorescence lifetime remain unresolved, especially about whether silicon nanocrystals (Si NCs) can realize fast direct-bandgap-like optical transitions. Here, using ground-state and excited-state density functional theory (DFT), we obtained intrinsic phonon-free optical transitions at sizes from Si22 to Si705, showing that very small Si NCs can realize a strong direct opti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2209.07747","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/2209.07747/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":"2026-07-05T05:11:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"08ZipHaNTbx5VwbK/WB9Ke13ZkITUXopEAvnvQEseaxCYYGV317+Skh2Smsw41QCGucrilQ0XfDUWoCtOL4FDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T21:06:37.818103Z"},"content_sha256":"b0ade76cd5c4dabdcf6d36476bfb4b480e7fee4092ff57f4c913f776e9ab2b32","schema_version":"1.0","event_id":"sha256:b0ade76cd5c4dabdcf6d36476bfb4b480e7fee4092ff57f4c913f776e9ab2b32"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HALST7VREGT6NMQPOTKONOIJCM/bundle.json","state_url":"https://pith.science/pith/HALST7VREGT6NMQPOTKONOIJCM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HALST7VREGT6NMQPOTKONOIJCM/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":"2026-08-04T21:06:37Z","links":{"resolver":"https://pith.science/pith/HALST7VREGT6NMQPOTKONOIJCM","bundle":"https://pith.science/pith/HALST7VREGT6NMQPOTKONOIJCM/bundle.json","state":"https://pith.science/pith/HALST7VREGT6NMQPOTKONOIJCM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HALST7VREGT6NMQPOTKONOIJCM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:HALST7VREGT6NMQPOTKONOIJCM","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":"1af7f95f3910cfebc506664dc142dbec8abab3d6d3ad01d48868f2886708c415","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2022-09-16T07:07:59Z","title_canon_sha256":"1d3147690d72cfcf82a7d525fba18ad0c86775b93ac69a854df98bd55524a7c4"},"schema_version":"1.0","source":{"id":"2209.07747","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2209.07747","created_at":"2026-07-05T05:11:42Z"},{"alias_kind":"arxiv_version","alias_value":"2209.07747v1","created_at":"2026-07-05T05:11:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2209.07747","created_at":"2026-07-05T05:11:42Z"},{"alias_kind":"pith_short_12","alias_value":"HALST7VREGT6","created_at":"2026-07-05T05:11:42Z"},{"alias_kind":"pith_short_16","alias_value":"HALST7VREGT6NMQP","created_at":"2026-07-05T05:11:42Z"},{"alias_kind":"pith_short_8","alias_value":"HALST7VR","created_at":"2026-07-05T05:11:42Z"}],"graph_snapshots":[{"event_id":"sha256:b0ade76cd5c4dabdcf6d36476bfb4b480e7fee4092ff57f4c913f776e9ab2b32","target":"graph","created_at":"2026-07-05T05:11:42Z","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/2209.07747/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Silicon photoluminescence and lasing have been critical issues to breakthrough bottlenecks in the understanding of luminescence mechanisms. Unfortunately, long-standing disputes about the exciton recombination mechanism and fluorescence lifetime remain unresolved, especially about whether silicon nanocrystals (Si NCs) can realize fast direct-bandgap-like optical transitions. Here, using ground-state and excited-state density functional theory (DFT), we obtained intrinsic phonon-free optical transitions at sizes from Si22 to Si705, showing that very small Si NCs can realize a strong direct opti","authors_text":"Feilong Wang, Qiongrong Ou, Shuyu Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2022-09-16T07:07:59Z","title":"Localized State-Induced Enhanced Intrinsic Phonon-Free Optical Transition in Silicon Nanocrystals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2209.07747","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":"sha256:5ef3fcfc2590b3f4f7948bd86645dcc8380f6d22de85fa6c0f95d2a279d158f7","target":"record","created_at":"2026-07-05T05:11:42Z","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":"1af7f95f3910cfebc506664dc142dbec8abab3d6d3ad01d48868f2886708c415","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2022-09-16T07:07:59Z","title_canon_sha256":"1d3147690d72cfcf82a7d525fba18ad0c86775b93ac69a854df98bd55524a7c4"},"schema_version":"1.0","source":{"id":"2209.07747","kind":"arxiv","version":1}},"canonical_sha256":"381729feb121a7e6b20f74d4e6b909130424b03b42e42bcd8cc43ea5334fe077","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"381729feb121a7e6b20f74d4e6b909130424b03b42e42bcd8cc43ea5334fe077","first_computed_at":"2026-07-05T05:11:42.753651Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:11:42.753651Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HzhPdDcV/h/e13anFydXxB2p4GtN+1D45o9Z41y8ilRBoPWT4foXUCQIvb6TlGvhDeL92yve0/rSFNvKcwxhAw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:11:42.754173Z","signed_message":"canonical_sha256_bytes"},"source_id":"2209.07747","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ef3fcfc2590b3f4f7948bd86645dcc8380f6d22de85fa6c0f95d2a279d158f7","sha256:b0ade76cd5c4dabdcf6d36476bfb4b480e7fee4092ff57f4c913f776e9ab2b32"],"state_sha256":"9d2a0c09334e49b97c28df7fa8c9ac3cfe4317c4f0f735042c160cd50dfa3acb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jgVPQlRzieofzVutFW/W8KzTXQb60THuRRsQgQEcYd1PEjDPnXWOOK5rirAPwuj+VfQOaiqX4DYRa3a3wJIQAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T21:06:37.823442Z","bundle_sha256":"85c300adb60f9c1f58e1d95051d1bbfb5e34f9fdd9b1de28847e8fa680a83eca"}}