{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:SPKTVDEOJRLELPPYKXMYGLVG5E","short_pith_number":"pith:SPKTVDEO","canonical_record":{"source":{"id":"1309.7346","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-09-26T21:05:29Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"90f817104e1e6063e9e6c32ab3268feb4bc0cc615a7fb1c2a7498baf09cff037","abstract_canon_sha256":"60db122fcb6d801dc52b4b5c6fadc5b524e27e733fe8cf6bee3de774242db2b4"},"schema_version":"1.0"},"canonical_sha256":"93d53a8c8e4c5645bdf855d9832ea6e937b61625e31fd4571d60bc905efaa056","source":{"kind":"arxiv","id":"1309.7346","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.7346","created_at":"2026-05-18T03:04:48Z"},{"alias_kind":"arxiv_version","alias_value":"1309.7346v2","created_at":"2026-05-18T03:04:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.7346","created_at":"2026-05-18T03:04:48Z"},{"alias_kind":"pith_short_12","alias_value":"SPKTVDEOJRLE","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SPKTVDEOJRLELPPY","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SPKTVDEO","created_at":"2026-05-18T12:27:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:SPKTVDEOJRLELPPYKXMYGLVG5E","target":"record","payload":{"canonical_record":{"source":{"id":"1309.7346","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-09-26T21:05:29Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"90f817104e1e6063e9e6c32ab3268feb4bc0cc615a7fb1c2a7498baf09cff037","abstract_canon_sha256":"60db122fcb6d801dc52b4b5c6fadc5b524e27e733fe8cf6bee3de774242db2b4"},"schema_version":"1.0"},"canonical_sha256":"93d53a8c8e4c5645bdf855d9832ea6e937b61625e31fd4571d60bc905efaa056","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:04:48.380591Z","signature_b64":"4uAUipOJfje8FQenx9St8Uu4E6EOu05mKAuX36e3JLOaxsLLkCG5J7dXxHbKs+RNKVWglPVJySklEYHTEl9AAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"93d53a8c8e4c5645bdf855d9832ea6e937b61625e31fd4571d60bc905efaa056","last_reissued_at":"2026-05-18T03:04:48.379986Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:04:48.379986Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.7346","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:04:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QIa9FUDdlimA1W+Lt4/gRg+G2LxEbUZBFeo0aPGp4zYtgUCDUk9iBkhhoxTtXlPeoKy8YgCsNKCO3YatzcSmCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T11:20:36.940972Z"},"content_sha256":"823dbd2047ad8857a91e859a9feae34b0201f682891c2995b5e68e008f5a88c3","schema_version":"1.0","event_id":"sha256:823dbd2047ad8857a91e859a9feae34b0201f682891c2995b5e68e008f5a88c3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:SPKTVDEOJRLELPPYKXMYGLVG5E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Knock-on damage in bilayer graphene: indications for a catalytic pathway","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Amaia Zurutuza, Andrey Chuvilin, Emilio Artacho, Fabiano Corsetti, Jon Zubeltzu","submitted_at":"2013-09-26T21:05:29Z","abstract_excerpt":"We study by high-resolution transmission electron microscopy the structural response of bilayer graphene to electron irradiation with energies below the knock-on damage threshold of graphene. We observe that one type of divacancy, which we refer to as the butterfly defect, is formed for radiation energies and doses for which no vacancies are formed in clean monolayer graphene. By using first principles calculations based on density-functional theory, we analyze two possible causes related with the presence of a second layer that could explain the observed phenomenon: an increase of the defect "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.7346","kind":"arxiv","version":2},"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":"2026-05-18T03:04:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"goF8AqqW9a1/LTPRMb2gRQUMDdp7g2gUpUMLYVbmH0Y04ZeQg4scsrPTdDNnx+D08ChEaBJxiF8HANRW0MwaCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T11:20:36.941330Z"},"content_sha256":"961e9a013c176762ef51b7b05abc3428e5bb9996d34da823fe8eab7916f872be","schema_version":"1.0","event_id":"sha256:961e9a013c176762ef51b7b05abc3428e5bb9996d34da823fe8eab7916f872be"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SPKTVDEOJRLELPPYKXMYGLVG5E/bundle.json","state_url":"https://pith.science/pith/SPKTVDEOJRLELPPYKXMYGLVG5E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SPKTVDEOJRLELPPYKXMYGLVG5E/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":"2026-06-01T11:20:36Z","links":{"resolver":"https://pith.science/pith/SPKTVDEOJRLELPPYKXMYGLVG5E","bundle":"https://pith.science/pith/SPKTVDEOJRLELPPYKXMYGLVG5E/bundle.json","state":"https://pith.science/pith/SPKTVDEOJRLELPPYKXMYGLVG5E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SPKTVDEOJRLELPPYKXMYGLVG5E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:SPKTVDEOJRLELPPYKXMYGLVG5E","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":"60db122fcb6d801dc52b4b5c6fadc5b524e27e733fe8cf6bee3de774242db2b4","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-09-26T21:05:29Z","title_canon_sha256":"90f817104e1e6063e9e6c32ab3268feb4bc0cc615a7fb1c2a7498baf09cff037"},"schema_version":"1.0","source":{"id":"1309.7346","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.7346","created_at":"2026-05-18T03:04:48Z"},{"alias_kind":"arxiv_version","alias_value":"1309.7346v2","created_at":"2026-05-18T03:04:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.7346","created_at":"2026-05-18T03:04:48Z"},{"alias_kind":"pith_short_12","alias_value":"SPKTVDEOJRLE","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SPKTVDEOJRLELPPY","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SPKTVDEO","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:961e9a013c176762ef51b7b05abc3428e5bb9996d34da823fe8eab7916f872be","target":"graph","created_at":"2026-05-18T03:04:48Z","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 study by high-resolution transmission electron microscopy the structural response of bilayer graphene to electron irradiation with energies below the knock-on damage threshold of graphene. We observe that one type of divacancy, which we refer to as the butterfly defect, is formed for radiation energies and doses for which no vacancies are formed in clean monolayer graphene. By using first principles calculations based on density-functional theory, we analyze two possible causes related with the presence of a second layer that could explain the observed phenomenon: an increase of the defect ","authors_text":"Amaia Zurutuza, Andrey Chuvilin, Emilio Artacho, Fabiano Corsetti, Jon Zubeltzu","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-09-26T21:05:29Z","title":"Knock-on damage in bilayer graphene: indications for a catalytic pathway"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.7346","kind":"arxiv","version":2},"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":"sha256:823dbd2047ad8857a91e859a9feae34b0201f682891c2995b5e68e008f5a88c3","target":"record","created_at":"2026-05-18T03:04:48Z","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":"60db122fcb6d801dc52b4b5c6fadc5b524e27e733fe8cf6bee3de774242db2b4","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-09-26T21:05:29Z","title_canon_sha256":"90f817104e1e6063e9e6c32ab3268feb4bc0cc615a7fb1c2a7498baf09cff037"},"schema_version":"1.0","source":{"id":"1309.7346","kind":"arxiv","version":2}},"canonical_sha256":"93d53a8c8e4c5645bdf855d9832ea6e937b61625e31fd4571d60bc905efaa056","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"93d53a8c8e4c5645bdf855d9832ea6e937b61625e31fd4571d60bc905efaa056","first_computed_at":"2026-05-18T03:04:48.379986Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:04:48.379986Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4uAUipOJfje8FQenx9St8Uu4E6EOu05mKAuX36e3JLOaxsLLkCG5J7dXxHbKs+RNKVWglPVJySklEYHTEl9AAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:04:48.380591Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.7346","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:823dbd2047ad8857a91e859a9feae34b0201f682891c2995b5e68e008f5a88c3","sha256:961e9a013c176762ef51b7b05abc3428e5bb9996d34da823fe8eab7916f872be"],"state_sha256":"a1da358a4ac64a3b9378d1dc9fef8ee8ec4b3637d0fa94a141f236d1dd12ae20"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S/b6vFXF+xuacP2Mk/GL4YceAv1kVj+fjnucrMNe07mwjkpjiVVvE2P6pgFdmH0DF92KHrvInX+od0JOYYGYDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T11:20:36.943373Z","bundle_sha256":"bc93de88450fcc788da71794781a7a6f40eb69522d8121997d20cc8c8620ef93"}}