{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:PNNE4FJA7AN4O42DWUSYQKADKS","short_pith_number":"pith:PNNE4FJA","canonical_record":{"source":{"id":"1308.6610","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-08-29T21:20:34Z","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.str-el"],"title_canon_sha256":"bc004285ead5cc9ce1111422d3afbd12655f4496ba8b4a324e0b14259652b085","abstract_canon_sha256":"0950be92127e770ca2b4d8e3ab8500a70122214edbca81ea74b2bbfa2bf408f5"},"schema_version":"1.0"},"canonical_sha256":"7b5a4e1520f81bc77343b52588280354a5b214baf6e62f4f23d7bdd5f7615f2a","source":{"kind":"arxiv","id":"1308.6610","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.6610","created_at":"2026-05-18T03:13:33Z"},{"alias_kind":"arxiv_version","alias_value":"1308.6610v1","created_at":"2026-05-18T03:13:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.6610","created_at":"2026-05-18T03:13:33Z"},{"alias_kind":"pith_short_12","alias_value":"PNNE4FJA7AN4","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PNNE4FJA7AN4O42D","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PNNE4FJA","created_at":"2026-05-18T12:27:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:PNNE4FJA7AN4O42DWUSYQKADKS","target":"record","payload":{"canonical_record":{"source":{"id":"1308.6610","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-08-29T21:20:34Z","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.str-el"],"title_canon_sha256":"bc004285ead5cc9ce1111422d3afbd12655f4496ba8b4a324e0b14259652b085","abstract_canon_sha256":"0950be92127e770ca2b4d8e3ab8500a70122214edbca81ea74b2bbfa2bf408f5"},"schema_version":"1.0"},"canonical_sha256":"7b5a4e1520f81bc77343b52588280354a5b214baf6e62f4f23d7bdd5f7615f2a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:13:33.405917Z","signature_b64":"whlj3IP2RYghGjHGVjqpGgNFLccef1w826tmfpmhYxS7EWFSSlNJFvrb1FoUuBX5RusrPlCWRBM7/vl5JdeeBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7b5a4e1520f81bc77343b52588280354a5b214baf6e62f4f23d7bdd5f7615f2a","last_reissued_at":"2026-05-18T03:13:33.405339Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:13:33.405339Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.6610","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":"2026-05-18T03:13:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kHHIyldhmd5j6SJPpSTthNt/1vuRQvqhghOMl6aAffBgQcWNm4ky/8FSPSPOXSXTAHNs7QKxaNDuQDSIvDRqCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T20:14:06.673899Z"},"content_sha256":"92fd6c0e8f57917e2d97a1a888216f65f76f0c393d6f0d1bf4b8d1b05a3fdce0","schema_version":"1.0","event_id":"sha256:92fd6c0e8f57917e2d97a1a888216f65f76f0c393d6f0d1bf4b8d1b05a3fdce0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:PNNE4FJA7AN4O42DWUSYQKADKS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electronic and optical gap renormalization in carbon nanotubes near a metallic surface","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","cond-mat.str-el"],"primary_cat":"cond-mat.mes-hall","authors_text":"Catalin D. Spataru","submitted_at":"2013-08-29T21:20:34Z","abstract_excerpt":"Renormalization of quasiparticles and excitons in carbon nanotubes (CNTs) near a metallic surface has been studied within a many-body formalism using an embedding approach newly implemented in the GW and Bethe-Salpeter methods. The quasiparticle bandgap renormalization in semiconducting CNTs is found to scale as -1/(2h_a), with h_a the apparent nanotube height, and it can exceed half an eV. Also, the binding energy of excitons is reduced dramatically -by as much as 75%- near the surface. Compensation between quasiparticle and excitonic effects results in small changes in the optical gap. The i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.6610","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":"2026-05-18T03:13:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CWz9E8EP2gjqHgRSxdWZ2VMGzaTct502MY6awNdAoOa48ecuGG9G+ubLjgvN0DCphwSrsgJssQQQLk0MukuVAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T20:14:06.674652Z"},"content_sha256":"876a5c19c88d4a4ec6fb78d57d64d0888d16fb63a1cd9e04ec49dc423d563aeb","schema_version":"1.0","event_id":"sha256:876a5c19c88d4a4ec6fb78d57d64d0888d16fb63a1cd9e04ec49dc423d563aeb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PNNE4FJA7AN4O42DWUSYQKADKS/bundle.json","state_url":"https://pith.science/pith/PNNE4FJA7AN4O42DWUSYQKADKS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PNNE4FJA7AN4O42DWUSYQKADKS/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":"2026-06-05T20:14:06Z","links":{"resolver":"https://pith.science/pith/PNNE4FJA7AN4O42DWUSYQKADKS","bundle":"https://pith.science/pith/PNNE4FJA7AN4O42DWUSYQKADKS/bundle.json","state":"https://pith.science/pith/PNNE4FJA7AN4O42DWUSYQKADKS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PNNE4FJA7AN4O42DWUSYQKADKS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:PNNE4FJA7AN4O42DWUSYQKADKS","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":"0950be92127e770ca2b4d8e3ab8500a70122214edbca81ea74b2bbfa2bf408f5","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-08-29T21:20:34Z","title_canon_sha256":"bc004285ead5cc9ce1111422d3afbd12655f4496ba8b4a324e0b14259652b085"},"schema_version":"1.0","source":{"id":"1308.6610","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.6610","created_at":"2026-05-18T03:13:33Z"},{"alias_kind":"arxiv_version","alias_value":"1308.6610v1","created_at":"2026-05-18T03:13:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.6610","created_at":"2026-05-18T03:13:33Z"},{"alias_kind":"pith_short_12","alias_value":"PNNE4FJA7AN4","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PNNE4FJA7AN4O42D","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PNNE4FJA","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:876a5c19c88d4a4ec6fb78d57d64d0888d16fb63a1cd9e04ec49dc423d563aeb","target":"graph","created_at":"2026-05-18T03:13:33Z","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":"Renormalization of quasiparticles and excitons in carbon nanotubes (CNTs) near a metallic surface has been studied within a many-body formalism using an embedding approach newly implemented in the GW and Bethe-Salpeter methods. The quasiparticle bandgap renormalization in semiconducting CNTs is found to scale as -1/(2h_a), with h_a the apparent nanotube height, and it can exceed half an eV. Also, the binding energy of excitons is reduced dramatically -by as much as 75%- near the surface. Compensation between quasiparticle and excitonic effects results in small changes in the optical gap. The i","authors_text":"Catalin D. Spataru","cross_cats":["cond-mat.mtrl-sci","cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-08-29T21:20:34Z","title":"Electronic and optical gap renormalization in carbon nanotubes near a metallic surface"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.6610","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":"sha256:92fd6c0e8f57917e2d97a1a888216f65f76f0c393d6f0d1bf4b8d1b05a3fdce0","target":"record","created_at":"2026-05-18T03:13:33Z","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":"0950be92127e770ca2b4d8e3ab8500a70122214edbca81ea74b2bbfa2bf408f5","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-08-29T21:20:34Z","title_canon_sha256":"bc004285ead5cc9ce1111422d3afbd12655f4496ba8b4a324e0b14259652b085"},"schema_version":"1.0","source":{"id":"1308.6610","kind":"arxiv","version":1}},"canonical_sha256":"7b5a4e1520f81bc77343b52588280354a5b214baf6e62f4f23d7bdd5f7615f2a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7b5a4e1520f81bc77343b52588280354a5b214baf6e62f4f23d7bdd5f7615f2a","first_computed_at":"2026-05-18T03:13:33.405339Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:13:33.405339Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"whlj3IP2RYghGjHGVjqpGgNFLccef1w826tmfpmhYxS7EWFSSlNJFvrb1FoUuBX5RusrPlCWRBM7/vl5JdeeBg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:13:33.405917Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.6610","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:92fd6c0e8f57917e2d97a1a888216f65f76f0c393d6f0d1bf4b8d1b05a3fdce0","sha256:876a5c19c88d4a4ec6fb78d57d64d0888d16fb63a1cd9e04ec49dc423d563aeb"],"state_sha256":"540e87bcd700ff78219a6272fc81808af997d0e78c640658230e112f9f223c9b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y4suWOli1efWw8McityBdgyBjIYvPFJBYSXzO76J0O8PjZGwMuGjEHR5evOl06Gln6RIjBoODuLSI210/1p2Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T20:14:06.678782Z","bundle_sha256":"fdd59c39053879bf57c40ce76aed7e0bbd35fbf0ea1796670eac720a112fa329"}}