{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:IY3QDCKKVSRWZVGGYEJFY6VNMC","short_pith_number":"pith:IY3QDCKK","canonical_record":{"source":{"id":"1803.06835","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-03-19T09:11:53Z","cross_cats_sorted":[],"title_canon_sha256":"2601961afa832f0fdb77839932023f592986ad51ebe90545f7b69ec20f88fdff","abstract_canon_sha256":"ea328742c6b0b576b3e9291e21edf9faab8558b8ccf59be44b0e5bc44ede11e1"},"schema_version":"1.0"},"canonical_sha256":"463701894aaca36cd4c6c1125c7aad60a4dd1d3988adeae49d866c8b7354b48d","source":{"kind":"arxiv","id":"1803.06835","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.06835","created_at":"2026-05-18T00:14:46Z"},{"alias_kind":"arxiv_version","alias_value":"1803.06835v1","created_at":"2026-05-18T00:14:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.06835","created_at":"2026-05-18T00:14:46Z"},{"alias_kind":"pith_short_12","alias_value":"IY3QDCKKVSRW","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"IY3QDCKKVSRWZVGG","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"IY3QDCKK","created_at":"2026-05-18T12:32:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:IY3QDCKKVSRWZVGGYEJFY6VNMC","target":"record","payload":{"canonical_record":{"source":{"id":"1803.06835","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-03-19T09:11:53Z","cross_cats_sorted":[],"title_canon_sha256":"2601961afa832f0fdb77839932023f592986ad51ebe90545f7b69ec20f88fdff","abstract_canon_sha256":"ea328742c6b0b576b3e9291e21edf9faab8558b8ccf59be44b0e5bc44ede11e1"},"schema_version":"1.0"},"canonical_sha256":"463701894aaca36cd4c6c1125c7aad60a4dd1d3988adeae49d866c8b7354b48d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:14:46.060057Z","signature_b64":"WgOMamOvLyv6hIwAD4BrqmudJpFcHO+L//VLeOQu9e25zsjZwtnHqk5ISZIWW/QLOK/AnPNxGG6oLF7JgDrTCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"463701894aaca36cd4c6c1125c7aad60a4dd1d3988adeae49d866c8b7354b48d","last_reissued_at":"2026-05-18T00:14:46.059478Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:14:46.059478Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.06835","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":"2026-05-18T00:14:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JOh8cWAZhTDKrJi+Gt0WAbH6962bR99oqP8FYfPDoU/Y/BMTGnPLSxKUKEZ3ztmSQ12beMiJ+Gj/AC/gOAhKAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T13:11:59.418505Z"},"content_sha256":"f0c26aa8afaf04814c7fcc696e582e1043201851a064eb636e565ffa370d4898","schema_version":"1.0","event_id":"sha256:f0c26aa8afaf04814c7fcc696e582e1043201851a064eb636e565ffa370d4898"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:IY3QDCKKVSRWZVGGYEJFY6VNMC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Prediction of two-dimensional nodal-line semimetal in a carbon nitride covalent network","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Chunxiao Zhang, Feng Liu, Haiyuan Chen, Heng Guo, Shunhong Zhang, Wei Jiang, Xiaobin Niu, Zheng Liu, Zhiming Wang","submitted_at":"2018-03-19T09:11:53Z","abstract_excerpt":"Carbon nitride compounds have emerged recently as a prominent member of 2D materials beyond graphene. The experimental realizations of 2D graphitic carbon nitride g-C$_3$N$_4$, nitrogenated holey grahpene C$_2$N, polyaniline C$_3$N have shown their promising potential in energy and environmental applications. In this work, we predict a new type of carbon nitride network with a C$_9$N$_4$ stoichiometry from first principle calculations. Unlike common C-N compounds and covalent organic frameworks (COFs), which are typically insulating, surprisingly C$_9$N$_4$ is found to be a 2D nodal-line semim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.06835","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":"2026-05-18T00:14:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"De5LolPlnz4RKf26VvPAyGBNnF6ptGMekXqo1d7iwAU0LjfUmY1bty4V4BrN4iD40L+SJl+W4GcdvQIM4bXnDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T13:11:59.418856Z"},"content_sha256":"0937a4fa7ddcc91367d93ff01a15b7384e4ae7505a428059d7f99540e9eb73c1","schema_version":"1.0","event_id":"sha256:0937a4fa7ddcc91367d93ff01a15b7384e4ae7505a428059d7f99540e9eb73c1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IY3QDCKKVSRWZVGGYEJFY6VNMC/bundle.json","state_url":"https://pith.science/pith/IY3QDCKKVSRWZVGGYEJFY6VNMC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IY3QDCKKVSRWZVGGYEJFY6VNMC/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":"2026-06-26T13:11:59Z","links":{"resolver":"https://pith.science/pith/IY3QDCKKVSRWZVGGYEJFY6VNMC","bundle":"https://pith.science/pith/IY3QDCKKVSRWZVGGYEJFY6VNMC/bundle.json","state":"https://pith.science/pith/IY3QDCKKVSRWZVGGYEJFY6VNMC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IY3QDCKKVSRWZVGGYEJFY6VNMC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:IY3QDCKKVSRWZVGGYEJFY6VNMC","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":"ea328742c6b0b576b3e9291e21edf9faab8558b8ccf59be44b0e5bc44ede11e1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-03-19T09:11:53Z","title_canon_sha256":"2601961afa832f0fdb77839932023f592986ad51ebe90545f7b69ec20f88fdff"},"schema_version":"1.0","source":{"id":"1803.06835","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.06835","created_at":"2026-05-18T00:14:46Z"},{"alias_kind":"arxiv_version","alias_value":"1803.06835v1","created_at":"2026-05-18T00:14:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.06835","created_at":"2026-05-18T00:14:46Z"},{"alias_kind":"pith_short_12","alias_value":"IY3QDCKKVSRW","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"IY3QDCKKVSRWZVGG","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"IY3QDCKK","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:0937a4fa7ddcc91367d93ff01a15b7384e4ae7505a428059d7f99540e9eb73c1","target":"graph","created_at":"2026-05-18T00:14:46Z","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":"Carbon nitride compounds have emerged recently as a prominent member of 2D materials beyond graphene. The experimental realizations of 2D graphitic carbon nitride g-C$_3$N$_4$, nitrogenated holey grahpene C$_2$N, polyaniline C$_3$N have shown their promising potential in energy and environmental applications. In this work, we predict a new type of carbon nitride network with a C$_9$N$_4$ stoichiometry from first principle calculations. Unlike common C-N compounds and covalent organic frameworks (COFs), which are typically insulating, surprisingly C$_9$N$_4$ is found to be a 2D nodal-line semim","authors_text":"Chunxiao Zhang, Feng Liu, Haiyuan Chen, Heng Guo, Shunhong Zhang, Wei Jiang, Xiaobin Niu, Zheng Liu, Zhiming Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-03-19T09:11:53Z","title":"Prediction of two-dimensional nodal-line semimetal in a carbon nitride covalent network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.06835","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:f0c26aa8afaf04814c7fcc696e582e1043201851a064eb636e565ffa370d4898","target":"record","created_at":"2026-05-18T00:14:46Z","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":"ea328742c6b0b576b3e9291e21edf9faab8558b8ccf59be44b0e5bc44ede11e1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-03-19T09:11:53Z","title_canon_sha256":"2601961afa832f0fdb77839932023f592986ad51ebe90545f7b69ec20f88fdff"},"schema_version":"1.0","source":{"id":"1803.06835","kind":"arxiv","version":1}},"canonical_sha256":"463701894aaca36cd4c6c1125c7aad60a4dd1d3988adeae49d866c8b7354b48d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"463701894aaca36cd4c6c1125c7aad60a4dd1d3988adeae49d866c8b7354b48d","first_computed_at":"2026-05-18T00:14:46.059478Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:14:46.059478Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WgOMamOvLyv6hIwAD4BrqmudJpFcHO+L//VLeOQu9e25zsjZwtnHqk5ISZIWW/QLOK/AnPNxGG6oLF7JgDrTCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:14:46.060057Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.06835","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f0c26aa8afaf04814c7fcc696e582e1043201851a064eb636e565ffa370d4898","sha256:0937a4fa7ddcc91367d93ff01a15b7384e4ae7505a428059d7f99540e9eb73c1"],"state_sha256":"7ba0d16fd1dc9ef326644e275a17f2f220ba8c0ce09f181c2e444ad7be4fbecf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7ZBWDi2iMO+JKxTeOPhxSO9BqW0XJbd+Oh6UnN5UgHjtwfFl/lyI0pCvdFoiOf94diJpl7Qtfw+4nBNx5/LUCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T13:11:59.420811Z","bundle_sha256":"03025c4ec4c08d1668c643f2ffa24438309206690a7db1ba3c27fbb8e31e9d4a"}}