{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:R2RYXFBU7L4Q5TKOOCOQC5XKXF","short_pith_number":"pith:R2RYXFBU","canonical_record":{"source":{"id":"1711.07250","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-11-20T10:52:32Z","cross_cats_sorted":[],"title_canon_sha256":"c1e399cca71f6db9012eb0b8af117426e9378b55b7cf39ee4aa40339b90b026f","abstract_canon_sha256":"f7bbe5abe251cf40ccffccb5aef155900c8b5f59074a0f8a5343024229087a0c"},"schema_version":"1.0"},"canonical_sha256":"8ea38b9434faf90ecd4e709d0176eab94b7b141cbf59072e2209df1c49e15c2a","source":{"kind":"arxiv","id":"1711.07250","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.07250","created_at":"2026-05-18T00:30:10Z"},{"alias_kind":"arxiv_version","alias_value":"1711.07250v1","created_at":"2026-05-18T00:30:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.07250","created_at":"2026-05-18T00:30:10Z"},{"alias_kind":"pith_short_12","alias_value":"R2RYXFBU7L4Q","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"R2RYXFBU7L4Q5TKO","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"R2RYXFBU","created_at":"2026-05-18T12:31:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:R2RYXFBU7L4Q5TKOOCOQC5XKXF","target":"record","payload":{"canonical_record":{"source":{"id":"1711.07250","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-11-20T10:52:32Z","cross_cats_sorted":[],"title_canon_sha256":"c1e399cca71f6db9012eb0b8af117426e9378b55b7cf39ee4aa40339b90b026f","abstract_canon_sha256":"f7bbe5abe251cf40ccffccb5aef155900c8b5f59074a0f8a5343024229087a0c"},"schema_version":"1.0"},"canonical_sha256":"8ea38b9434faf90ecd4e709d0176eab94b7b141cbf59072e2209df1c49e15c2a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:30:10.744367Z","signature_b64":"Ptki1/2z6+U4GYrdNd62+tf/msGzQwBWamvZSj1JpsqJrx7/I9Bxc4c6gjbkPziZrIhYw9AluoPaodl5kv40Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ea38b9434faf90ecd4e709d0176eab94b7b141cbf59072e2209df1c49e15c2a","last_reissued_at":"2026-05-18T00:30:10.743674Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:30:10.743674Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.07250","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":"2026-05-18T00:30:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yXgR4rYSinnr8yfBFoHBaEW338AfAYg3mB9ODliZII03XPWzh/w6d6zl1qwJt60XaczASZ6gUstZa+jO0+ydBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:47:11.537365Z"},"content_sha256":"a3508d1a44e8ecb4662aca645852530ca071ab998e7694695be335c1a8352cc1","schema_version":"1.0","event_id":"sha256:a3508d1a44e8ecb4662aca645852530ca071ab998e7694695be335c1a8352cc1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:R2RYXFBU7L4Q5TKOOCOQC5XKXF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Structure and Electronic States of a Graphene Double Vacancy with an Embedded Si Dopant","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Ad\\'elia J. A. Aquino, Hans Lischka, Jani Kotakoski, Reed Nieman, Toma Susi, Trevor P. Hardcastle","submitted_at":"2017-11-20T10:52:32Z","abstract_excerpt":"Silicon represents a common intrinsic impurity in graphene, commonly bonding to either three or four carbon neighbors respectively in a single or double carbon vacancy. We investigate the effect of the latter defect (Si-C$_4$) on the structural and electronic properties of graphene using density functional theory (DFT). Calculations based both on molecular models and with periodic boundary conditions have been performed. The two-carbon vacancy was constructed from pyrene (pyrene-2C) which was then expanded to circumpyrene-2C. The structural characterization of these cases revealed that the gro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.07250","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":"2026-05-18T00:30:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cg5qtR1mRcbKtdtSlrpsahetcT3OICfO9ud1h1xUq7VZJQ5eTznTcZM504rEISq+IjaUtJB3y3F17iFL0fOvCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:47:11.538026Z"},"content_sha256":"2aaeff7001d456156b70d4d99e3211f1a27f729fb91735e97a2b2f8596253aa6","schema_version":"1.0","event_id":"sha256:2aaeff7001d456156b70d4d99e3211f1a27f729fb91735e97a2b2f8596253aa6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R2RYXFBU7L4Q5TKOOCOQC5XKXF/bundle.json","state_url":"https://pith.science/pith/R2RYXFBU7L4Q5TKOOCOQC5XKXF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R2RYXFBU7L4Q5TKOOCOQC5XKXF/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":"2026-05-26T23:47:11Z","links":{"resolver":"https://pith.science/pith/R2RYXFBU7L4Q5TKOOCOQC5XKXF","bundle":"https://pith.science/pith/R2RYXFBU7L4Q5TKOOCOQC5XKXF/bundle.json","state":"https://pith.science/pith/R2RYXFBU7L4Q5TKOOCOQC5XKXF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R2RYXFBU7L4Q5TKOOCOQC5XKXF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:R2RYXFBU7L4Q5TKOOCOQC5XKXF","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":"f7bbe5abe251cf40ccffccb5aef155900c8b5f59074a0f8a5343024229087a0c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-11-20T10:52:32Z","title_canon_sha256":"c1e399cca71f6db9012eb0b8af117426e9378b55b7cf39ee4aa40339b90b026f"},"schema_version":"1.0","source":{"id":"1711.07250","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.07250","created_at":"2026-05-18T00:30:10Z"},{"alias_kind":"arxiv_version","alias_value":"1711.07250v1","created_at":"2026-05-18T00:30:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.07250","created_at":"2026-05-18T00:30:10Z"},{"alias_kind":"pith_short_12","alias_value":"R2RYXFBU7L4Q","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"R2RYXFBU7L4Q5TKO","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"R2RYXFBU","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:2aaeff7001d456156b70d4d99e3211f1a27f729fb91735e97a2b2f8596253aa6","target":"graph","created_at":"2026-05-18T00:30:10Z","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":"Silicon represents a common intrinsic impurity in graphene, commonly bonding to either three or four carbon neighbors respectively in a single or double carbon vacancy. We investigate the effect of the latter defect (Si-C$_4$) on the structural and electronic properties of graphene using density functional theory (DFT). Calculations based both on molecular models and with periodic boundary conditions have been performed. The two-carbon vacancy was constructed from pyrene (pyrene-2C) which was then expanded to circumpyrene-2C. The structural characterization of these cases revealed that the gro","authors_text":"Ad\\'elia J. A. Aquino, Hans Lischka, Jani Kotakoski, Reed Nieman, Toma Susi, Trevor P. Hardcastle","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-11-20T10:52:32Z","title":"Structure and Electronic States of a Graphene Double Vacancy with an Embedded Si Dopant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.07250","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:a3508d1a44e8ecb4662aca645852530ca071ab998e7694695be335c1a8352cc1","target":"record","created_at":"2026-05-18T00:30:10Z","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":"f7bbe5abe251cf40ccffccb5aef155900c8b5f59074a0f8a5343024229087a0c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-11-20T10:52:32Z","title_canon_sha256":"c1e399cca71f6db9012eb0b8af117426e9378b55b7cf39ee4aa40339b90b026f"},"schema_version":"1.0","source":{"id":"1711.07250","kind":"arxiv","version":1}},"canonical_sha256":"8ea38b9434faf90ecd4e709d0176eab94b7b141cbf59072e2209df1c49e15c2a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ea38b9434faf90ecd4e709d0176eab94b7b141cbf59072e2209df1c49e15c2a","first_computed_at":"2026-05-18T00:30:10.743674Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:30:10.743674Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ptki1/2z6+U4GYrdNd62+tf/msGzQwBWamvZSj1JpsqJrx7/I9Bxc4c6gjbkPziZrIhYw9AluoPaodl5kv40Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T00:30:10.744367Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.07250","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a3508d1a44e8ecb4662aca645852530ca071ab998e7694695be335c1a8352cc1","sha256:2aaeff7001d456156b70d4d99e3211f1a27f729fb91735e97a2b2f8596253aa6"],"state_sha256":"f13aa8cf3a3109603e188b2066d7b1fbc3614b00562e71dc8b544c4df5312410"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6aDTnVqdkfgCU8727SqJVljYwVpLWMXlKKo+TNyPDcwgd2AWUfzWd314zHsFIYxx2zH89w22exZywa8pgX3kCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T23:47:11.541769Z","bundle_sha256":"aeaefef0bf7bea21d113c25b0fb354eab129fcbba939a27addb07a6aea4c3278"}}