{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:57EZFVJSJF2O35SM46HXBZVOJF","short_pith_number":"pith:57EZFVJS","canonical_record":{"source":{"id":"0910.4043","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-10-21T10:43:36Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"691904536769287bfb183cd2adbf197e58cfdd7429c168d47b41ee22cd52bb16","abstract_canon_sha256":"75139ff18e6430f6207a4c313723bb929520201f736cb5693fb3978f693e5126"},"schema_version":"1.0"},"canonical_sha256":"efc992d5324974edf64ce78f70e6ae49434faac82570d82b84394e28e65e3e62","source":{"kind":"arxiv","id":"0910.4043","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.4043","created_at":"2026-05-18T02:11:13Z"},{"alias_kind":"arxiv_version","alias_value":"0910.4043v1","created_at":"2026-05-18T02:11:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.4043","created_at":"2026-05-18T02:11:13Z"},{"alias_kind":"pith_short_12","alias_value":"57EZFVJSJF2O","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"57EZFVJSJF2O35SM","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"57EZFVJS","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:57EZFVJSJF2O35SM46HXBZVOJF","target":"record","payload":{"canonical_record":{"source":{"id":"0910.4043","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-10-21T10:43:36Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"691904536769287bfb183cd2adbf197e58cfdd7429c168d47b41ee22cd52bb16","abstract_canon_sha256":"75139ff18e6430f6207a4c313723bb929520201f736cb5693fb3978f693e5126"},"schema_version":"1.0"},"canonical_sha256":"efc992d5324974edf64ce78f70e6ae49434faac82570d82b84394e28e65e3e62","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:13.370005Z","signature_b64":"VojsZGu+sn5Hpp9KTjc2ZO6NE+d7w+xjWozDsLRkkB6XonCTXFdYuRwn3hJoq5t14/ZcS41BjA5eFv/XkJB8Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"efc992d5324974edf64ce78f70e6ae49434faac82570d82b84394e28e65e3e62","last_reissued_at":"2026-05-18T02:11:13.369073Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:13.369073Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0910.4043","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":"2026-05-18T02:11:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"muZ+I1TOwC7wSgJ1sRI9dOwUbBLzIZdZDr8VQ+/Xbr7GxpBIhVimKvQrjMnH+B6DOe3wYpprQ6CSqcO8xw3uCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T09:57:28.050830Z"},"content_sha256":"d5ae9112c94b942e8a56741f23bbbf46beca44c5e1236859558dc591dd43301e","schema_version":"1.0","event_id":"sha256:d5ae9112c94b942e8a56741f23bbbf46beca44c5e1236859558dc591dd43301e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:57EZFVJSJF2O35SM46HXBZVOJF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spin Valve Effect in ZigZag Graphene Nanoribbons by Defect Engineering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Gianaurelio Cuniberti, Sankaran Lakshmi, Stephan Roche","submitted_at":"2009-10-21T10:43:36Z","abstract_excerpt":"We report on the possibility for a spin valve effect driven by edge defect engineering of zigzag graphene nanoribbons. Based on a mean-field spin unrestricted Hubbard model, electronic band structures and conductance profiles are derived, using a self-consistent scheme to include gate-induced charge density. The use of an external gate is found to trigger a semiconductor-metal transition in clean zigzag graphene nanoribbons, whereas it yields a closure of the spin-split bandgap in the presence of Klein edge defects. These features could be exploited to make novel charge and spin based switches"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.4043","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":"2026-05-18T02:11:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ajKE+ST8daBs5fK8WUAZE9euVn6B9BfqF7nE+sl21JpOWprUbkIVbdgyqwzRibVtxk+cPXQbnGm2gDC3zaP/AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T09:57:28.051177Z"},"content_sha256":"4a16fb3a40ea48411cab0c8bc057d21d391f8a20a5f3296eec16df0e7cf72207","schema_version":"1.0","event_id":"sha256:4a16fb3a40ea48411cab0c8bc057d21d391f8a20a5f3296eec16df0e7cf72207"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/57EZFVJSJF2O35SM46HXBZVOJF/bundle.json","state_url":"https://pith.science/pith/57EZFVJSJF2O35SM46HXBZVOJF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/57EZFVJSJF2O35SM46HXBZVOJF/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":"2026-05-19T09:57:28Z","links":{"resolver":"https://pith.science/pith/57EZFVJSJF2O35SM46HXBZVOJF","bundle":"https://pith.science/pith/57EZFVJSJF2O35SM46HXBZVOJF/bundle.json","state":"https://pith.science/pith/57EZFVJSJF2O35SM46HXBZVOJF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/57EZFVJSJF2O35SM46HXBZVOJF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:57EZFVJSJF2O35SM46HXBZVOJF","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":"75139ff18e6430f6207a4c313723bb929520201f736cb5693fb3978f693e5126","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-10-21T10:43:36Z","title_canon_sha256":"691904536769287bfb183cd2adbf197e58cfdd7429c168d47b41ee22cd52bb16"},"schema_version":"1.0","source":{"id":"0910.4043","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.4043","created_at":"2026-05-18T02:11:13Z"},{"alias_kind":"arxiv_version","alias_value":"0910.4043v1","created_at":"2026-05-18T02:11:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.4043","created_at":"2026-05-18T02:11:13Z"},{"alias_kind":"pith_short_12","alias_value":"57EZFVJSJF2O","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"57EZFVJSJF2O35SM","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"57EZFVJS","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:4a16fb3a40ea48411cab0c8bc057d21d391f8a20a5f3296eec16df0e7cf72207","target":"graph","created_at":"2026-05-18T02:11:13Z","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 report on the possibility for a spin valve effect driven by edge defect engineering of zigzag graphene nanoribbons. Based on a mean-field spin unrestricted Hubbard model, electronic band structures and conductance profiles are derived, using a self-consistent scheme to include gate-induced charge density. The use of an external gate is found to trigger a semiconductor-metal transition in clean zigzag graphene nanoribbons, whereas it yields a closure of the spin-split bandgap in the presence of Klein edge defects. These features could be exploited to make novel charge and spin based switches","authors_text":"Gianaurelio Cuniberti, Sankaran Lakshmi, Stephan Roche","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-10-21T10:43:36Z","title":"Spin Valve Effect in ZigZag Graphene Nanoribbons by Defect Engineering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.4043","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:d5ae9112c94b942e8a56741f23bbbf46beca44c5e1236859558dc591dd43301e","target":"record","created_at":"2026-05-18T02:11:13Z","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":"75139ff18e6430f6207a4c313723bb929520201f736cb5693fb3978f693e5126","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-10-21T10:43:36Z","title_canon_sha256":"691904536769287bfb183cd2adbf197e58cfdd7429c168d47b41ee22cd52bb16"},"schema_version":"1.0","source":{"id":"0910.4043","kind":"arxiv","version":1}},"canonical_sha256":"efc992d5324974edf64ce78f70e6ae49434faac82570d82b84394e28e65e3e62","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"efc992d5324974edf64ce78f70e6ae49434faac82570d82b84394e28e65e3e62","first_computed_at":"2026-05-18T02:11:13.369073Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:13.369073Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VojsZGu+sn5Hpp9KTjc2ZO6NE+d7w+xjWozDsLRkkB6XonCTXFdYuRwn3hJoq5t14/ZcS41BjA5eFv/XkJB8Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:13.370005Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.4043","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d5ae9112c94b942e8a56741f23bbbf46beca44c5e1236859558dc591dd43301e","sha256:4a16fb3a40ea48411cab0c8bc057d21d391f8a20a5f3296eec16df0e7cf72207"],"state_sha256":"021ca5b64ed32efb4b64e3b0cff89cca87cf57bca6e1cc2edb809f223e40c577"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YgyusfhTwAoK3a/mPA284bDDJ/cS6P2z6zK1kaw6q5O3ECvaaW2EQQkHsU6fS34ukjDyiDsFa+PDcV3hsv8XDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T09:57:28.053296Z","bundle_sha256":"108419a877a349f8bb40f5c7e87b7e632dba33d6f4cbbb484a689ae85b31f173"}}