{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:YX5U6QOTKPC66KS7NT5AVPTBDB","short_pith_number":"pith:YX5U6QOT","canonical_record":{"source":{"id":"1105.5531","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-05-27T11:34:22Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"dc66d42073f4656844dc835a05cd2e789eeb87be4f5a8007407d0946d273168e","abstract_canon_sha256":"a4d936c3eab387f94cba62b1a9def27dea16e5c0194996971ffa6c796aee1d9d"},"schema_version":"1.0"},"canonical_sha256":"c5fb4f41d353c5ef2a5f6cfa0abe61184f92f4742e5ff00546f58f6406ea460b","source":{"kind":"arxiv","id":"1105.5531","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.5531","created_at":"2026-05-18T04:14:56Z"},{"alias_kind":"arxiv_version","alias_value":"1105.5531v1","created_at":"2026-05-18T04:14:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.5531","created_at":"2026-05-18T04:14:56Z"},{"alias_kind":"pith_short_12","alias_value":"YX5U6QOTKPC6","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"YX5U6QOTKPC66KS7","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"YX5U6QOT","created_at":"2026-05-18T12:26:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:YX5U6QOTKPC66KS7NT5AVPTBDB","target":"record","payload":{"canonical_record":{"source":{"id":"1105.5531","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-05-27T11:34:22Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"dc66d42073f4656844dc835a05cd2e789eeb87be4f5a8007407d0946d273168e","abstract_canon_sha256":"a4d936c3eab387f94cba62b1a9def27dea16e5c0194996971ffa6c796aee1d9d"},"schema_version":"1.0"},"canonical_sha256":"c5fb4f41d353c5ef2a5f6cfa0abe61184f92f4742e5ff00546f58f6406ea460b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:14:56.476409Z","signature_b64":"NA0QxUcyVWCWUixj/7VyVb24kBmWIeoen2TLz3/O7zzKW8/nBPcvmIYfNWm1Nz9fd30AT77ordXG5a8LyiiXDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c5fb4f41d353c5ef2a5f6cfa0abe61184f92f4742e5ff00546f58f6406ea460b","last_reissued_at":"2026-05-18T04:14:56.475959Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:14:56.475959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1105.5531","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":"2026-05-18T04:14:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w+c8r5VmbUkAP+EUrsvqTUsLDsncPGPUKcajjuGcBqKwfvs/Qpz0rNtv/MI8g+ZTGPttpl33n7vlnHI1SNhBCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:37:53.583208Z"},"content_sha256":"08ec1a253d65e471a5641c94f5801d50ab3b6756337319430464613922aa20fe","schema_version":"1.0","event_id":"sha256:08ec1a253d65e471a5641c94f5801d50ab3b6756337319430464613922aa20fe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:YX5U6QOTKPC66KS7NT5AVPTBDB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Excitonic effects in the optical properties of SiC sheet and nanotubes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"G. Y. Guo, H. C. Hsueh, Steven G. Louie","submitted_at":"2011-05-27T11:34:22Z","abstract_excerpt":"The quasiparticle band structure and optical properties of single-walled zigzag and armchair SiC nanotubes (SiC-NTs) as well as single SiC sheet are investigated by ab initio many-body calculations using the GW and the GW plus Bethe-Salpeter equation (GW+BSE) approaches, respectively. Significant GW quasiparticle corrections of more than 1.0 eV to the Kohn-Sham band gaps from the local density approximation (LDA) calculations are found. The GW self-energy corrections transform the SiC sheet from a indirect LDA band gap to a direct band gap material. Furthermore, the quasiparticle band gaps of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.5531","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":"2026-05-18T04:14:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l8TzpfkxGL1g+IFVQU7fJ82vlrH9LRIVFkeEEmiTP/zxW9a/sp5XpAVHZJ2S2PnX45bCxYU3rhA/QCXPL4IdBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:37:53.583899Z"},"content_sha256":"add061d9de89a50d955487be442589eabbe991d1a12b9c67d31d0de8c3313f75","schema_version":"1.0","event_id":"sha256:add061d9de89a50d955487be442589eabbe991d1a12b9c67d31d0de8c3313f75"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YX5U6QOTKPC66KS7NT5AVPTBDB/bundle.json","state_url":"https://pith.science/pith/YX5U6QOTKPC66KS7NT5AVPTBDB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YX5U6QOTKPC66KS7NT5AVPTBDB/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":"2026-05-25T16:37:53Z","links":{"resolver":"https://pith.science/pith/YX5U6QOTKPC66KS7NT5AVPTBDB","bundle":"https://pith.science/pith/YX5U6QOTKPC66KS7NT5AVPTBDB/bundle.json","state":"https://pith.science/pith/YX5U6QOTKPC66KS7NT5AVPTBDB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YX5U6QOTKPC66KS7NT5AVPTBDB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:YX5U6QOTKPC66KS7NT5AVPTBDB","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":"a4d936c3eab387f94cba62b1a9def27dea16e5c0194996971ffa6c796aee1d9d","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-05-27T11:34:22Z","title_canon_sha256":"dc66d42073f4656844dc835a05cd2e789eeb87be4f5a8007407d0946d273168e"},"schema_version":"1.0","source":{"id":"1105.5531","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.5531","created_at":"2026-05-18T04:14:56Z"},{"alias_kind":"arxiv_version","alias_value":"1105.5531v1","created_at":"2026-05-18T04:14:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.5531","created_at":"2026-05-18T04:14:56Z"},{"alias_kind":"pith_short_12","alias_value":"YX5U6QOTKPC6","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"YX5U6QOTKPC66KS7","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"YX5U6QOT","created_at":"2026-05-18T12:26:47Z"}],"graph_snapshots":[{"event_id":"sha256:add061d9de89a50d955487be442589eabbe991d1a12b9c67d31d0de8c3313f75","target":"graph","created_at":"2026-05-18T04:14:56Z","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":"The quasiparticle band structure and optical properties of single-walled zigzag and armchair SiC nanotubes (SiC-NTs) as well as single SiC sheet are investigated by ab initio many-body calculations using the GW and the GW plus Bethe-Salpeter equation (GW+BSE) approaches, respectively. Significant GW quasiparticle corrections of more than 1.0 eV to the Kohn-Sham band gaps from the local density approximation (LDA) calculations are found. The GW self-energy corrections transform the SiC sheet from a indirect LDA band gap to a direct band gap material. Furthermore, the quasiparticle band gaps of ","authors_text":"G. Y. Guo, H. C. Hsueh, Steven G. Louie","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-05-27T11:34:22Z","title":"Excitonic effects in the optical properties of SiC sheet and nanotubes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.5531","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":"sha256:08ec1a253d65e471a5641c94f5801d50ab3b6756337319430464613922aa20fe","target":"record","created_at":"2026-05-18T04:14:56Z","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":"a4d936c3eab387f94cba62b1a9def27dea16e5c0194996971ffa6c796aee1d9d","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-05-27T11:34:22Z","title_canon_sha256":"dc66d42073f4656844dc835a05cd2e789eeb87be4f5a8007407d0946d273168e"},"schema_version":"1.0","source":{"id":"1105.5531","kind":"arxiv","version":1}},"canonical_sha256":"c5fb4f41d353c5ef2a5f6cfa0abe61184f92f4742e5ff00546f58f6406ea460b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c5fb4f41d353c5ef2a5f6cfa0abe61184f92f4742e5ff00546f58f6406ea460b","first_computed_at":"2026-05-18T04:14:56.475959Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:14:56.475959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NA0QxUcyVWCWUixj/7VyVb24kBmWIeoen2TLz3/O7zzKW8/nBPcvmIYfNWm1Nz9fd30AT77ordXG5a8LyiiXDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:14:56.476409Z","signed_message":"canonical_sha256_bytes"},"source_id":"1105.5531","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:08ec1a253d65e471a5641c94f5801d50ab3b6756337319430464613922aa20fe","sha256:add061d9de89a50d955487be442589eabbe991d1a12b9c67d31d0de8c3313f75"],"state_sha256":"b1800f41ec1ae4792a1066102bac72e3cd9729099dc910854636ce889b5625a8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hGtnJRdLZ3vsCBBOyHEniE6BWGDm8A1VTPszdF7ouUwZuKBPHlyyQnqNL0hJrgXI8v65pEbp7mv74lJBLWiODA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:37:53.587635Z","bundle_sha256":"4440d84e963d7d213ac38c4cac5a41bd3301a3b35bed78092005fc588e9d1653"}}