{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:3D4AQ5V76ZM36UW4FU3W3VTP7Z","short_pith_number":"pith:3D4AQ5V7","canonical_record":{"source":{"id":"1204.1542","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-06T19:27:57Z","cross_cats_sorted":[],"title_canon_sha256":"bf450749a63f2592835f89b9742814ed5779bf17e009d50111a36a89f2ec9ad0","abstract_canon_sha256":"48562be182be20179b816dab7c308bc520dbe3df4f8e994d5b4e7144c64cf71d"},"schema_version":"1.0"},"canonical_sha256":"d8f80876bff659bf52dc2d376dd66ffe656d48a4710b51b1632edcf8b27e087b","source":{"kind":"arxiv","id":"1204.1542","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.1542","created_at":"2026-05-18T03:52:41Z"},{"alias_kind":"arxiv_version","alias_value":"1204.1542v1","created_at":"2026-05-18T03:52:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.1542","created_at":"2026-05-18T03:52:41Z"},{"alias_kind":"pith_short_12","alias_value":"3D4AQ5V76ZM3","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"3D4AQ5V76ZM36UW4","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"3D4AQ5V7","created_at":"2026-05-18T12:26:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:3D4AQ5V76ZM36UW4FU3W3VTP7Z","target":"record","payload":{"canonical_record":{"source":{"id":"1204.1542","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-06T19:27:57Z","cross_cats_sorted":[],"title_canon_sha256":"bf450749a63f2592835f89b9742814ed5779bf17e009d50111a36a89f2ec9ad0","abstract_canon_sha256":"48562be182be20179b816dab7c308bc520dbe3df4f8e994d5b4e7144c64cf71d"},"schema_version":"1.0"},"canonical_sha256":"d8f80876bff659bf52dc2d376dd66ffe656d48a4710b51b1632edcf8b27e087b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:52:41.348993Z","signature_b64":"lhFMMJb+ZVHPAPoMCnc0IAMcET4GKRc/A+8aaL4g9PNFIZ1Hf9xBe632gZjInjP/lPbD0E1OXJTIG9WDVGcRBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d8f80876bff659bf52dc2d376dd66ffe656d48a4710b51b1632edcf8b27e087b","last_reissued_at":"2026-05-18T03:52:41.348542Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:52:41.348542Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1204.1542","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":"2026-05-18T03:52:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SgFPaEPxXCQ8y5grStiPHeT7+pjjJKI/WwYdUSmGjk4RBe1kXQ2+EgwMwtkg0QxrbWi8PyGlztqBQ1i0HLQiAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T16:00:51.509624Z"},"content_sha256":"2046c0acb7042199cd676a13ddb7b54b5063079ae74a1f75ec67c94d79ad57e2","schema_version":"1.0","event_id":"sha256:2046c0acb7042199cd676a13ddb7b54b5063079ae74a1f75ec67c94d79ad57e2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:3D4AQ5V76ZM36UW4FU3W3VTP7Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optoelectronic Properties and Excitons in Hybridized Boron Nitride and Graphene Hexagonal Monolayers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Jeffrey C. Grossman, Marco Bernardi, Maurizia Palummo","submitted_at":"2012-04-06T19:27:57Z","abstract_excerpt":"We explain the nature of the electronic band gap and optical absorption spectrum of Carbon - Boron Nitride (CBN) hybridized monolayers using density functional theory (DFT), GW and Bethe-Salpeter equation calculations. The CBN optoelectronic properties result from the overall monolayer bandstructure, whose quasiparticle states are controlled by the C domain size and lie at separate energy for C and BN without significant mixing at the band edge, as confirmed by the presence of strongly bound bright exciton states localized within the C domains. The resulting absorption spectra show two marked "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.1542","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":"2026-05-18T03:52:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NGxbtL2iQYETEsSJtOhIgh/Jp8WnMkh+6FVrLvRQc9bUjyFEAJZKQGDdz0xnH/DaGGwZK5GO/ntfyeh6diJUDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T16:00:51.509967Z"},"content_sha256":"8f5df8cc9a784d9b630a25df125c62ca9ba83c73e09126da8da1575166fee9f0","schema_version":"1.0","event_id":"sha256:8f5df8cc9a784d9b630a25df125c62ca9ba83c73e09126da8da1575166fee9f0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3D4AQ5V76ZM36UW4FU3W3VTP7Z/bundle.json","state_url":"https://pith.science/pith/3D4AQ5V76ZM36UW4FU3W3VTP7Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3D4AQ5V76ZM36UW4FU3W3VTP7Z/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":"2026-07-07T16:00:51Z","links":{"resolver":"https://pith.science/pith/3D4AQ5V76ZM36UW4FU3W3VTP7Z","bundle":"https://pith.science/pith/3D4AQ5V76ZM36UW4FU3W3VTP7Z/bundle.json","state":"https://pith.science/pith/3D4AQ5V76ZM36UW4FU3W3VTP7Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3D4AQ5V76ZM36UW4FU3W3VTP7Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:3D4AQ5V76ZM36UW4FU3W3VTP7Z","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":"48562be182be20179b816dab7c308bc520dbe3df4f8e994d5b4e7144c64cf71d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-06T19:27:57Z","title_canon_sha256":"bf450749a63f2592835f89b9742814ed5779bf17e009d50111a36a89f2ec9ad0"},"schema_version":"1.0","source":{"id":"1204.1542","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.1542","created_at":"2026-05-18T03:52:41Z"},{"alias_kind":"arxiv_version","alias_value":"1204.1542v1","created_at":"2026-05-18T03:52:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.1542","created_at":"2026-05-18T03:52:41Z"},{"alias_kind":"pith_short_12","alias_value":"3D4AQ5V76ZM3","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"3D4AQ5V76ZM36UW4","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"3D4AQ5V7","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:8f5df8cc9a784d9b630a25df125c62ca9ba83c73e09126da8da1575166fee9f0","target":"graph","created_at":"2026-05-18T03:52:41Z","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 explain the nature of the electronic band gap and optical absorption spectrum of Carbon - Boron Nitride (CBN) hybridized monolayers using density functional theory (DFT), GW and Bethe-Salpeter equation calculations. The CBN optoelectronic properties result from the overall monolayer bandstructure, whose quasiparticle states are controlled by the C domain size and lie at separate energy for C and BN without significant mixing at the band edge, as confirmed by the presence of strongly bound bright exciton states localized within the C domains. The resulting absorption spectra show two marked ","authors_text":"Jeffrey C. Grossman, Marco Bernardi, Maurizia Palummo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-06T19:27:57Z","title":"Optoelectronic Properties and Excitons in Hybridized Boron Nitride and Graphene Hexagonal Monolayers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.1542","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":"sha256:2046c0acb7042199cd676a13ddb7b54b5063079ae74a1f75ec67c94d79ad57e2","target":"record","created_at":"2026-05-18T03:52:41Z","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":"48562be182be20179b816dab7c308bc520dbe3df4f8e994d5b4e7144c64cf71d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-06T19:27:57Z","title_canon_sha256":"bf450749a63f2592835f89b9742814ed5779bf17e009d50111a36a89f2ec9ad0"},"schema_version":"1.0","source":{"id":"1204.1542","kind":"arxiv","version":1}},"canonical_sha256":"d8f80876bff659bf52dc2d376dd66ffe656d48a4710b51b1632edcf8b27e087b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d8f80876bff659bf52dc2d376dd66ffe656d48a4710b51b1632edcf8b27e087b","first_computed_at":"2026-05-18T03:52:41.348542Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:52:41.348542Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lhFMMJb+ZVHPAPoMCnc0IAMcET4GKRc/A+8aaL4g9PNFIZ1Hf9xBe632gZjInjP/lPbD0E1OXJTIG9WDVGcRBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:52:41.348993Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.1542","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2046c0acb7042199cd676a13ddb7b54b5063079ae74a1f75ec67c94d79ad57e2","sha256:8f5df8cc9a784d9b630a25df125c62ca9ba83c73e09126da8da1575166fee9f0"],"state_sha256":"df5276932e04521235920a18277b6b3ca757d8db7e3248c748a60f9238053b5e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JBpTkqCIb4isTYZjaCL22uTvLFO9FTXw4SDaZ4M2KtkJwIRY08BWfrYksf1W0JLgM/01Q7TGGq52Atoz87NmBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T16:00:51.511840Z","bundle_sha256":"6da9988b9b35559a2c73d96f75cc9d16654ab4920ec989bbf48dbcb20402eb46"}}