{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:Z7PZ74OFPD3SBGBRXTHSARI6PF","short_pith_number":"pith:Z7PZ74OF","canonical_record":{"source":{"id":"1807.08481","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-07-23T08:35:04Z","cross_cats_sorted":[],"title_canon_sha256":"75e8a1be25d235889bf3b7764ca233da8bc189589917706fab5ce84bb6e3d821","abstract_canon_sha256":"2c6d862bb608e388b06745fcbd6267aade3c760139b7524c49c0e9d4c14cc831"},"schema_version":"1.0"},"canonical_sha256":"cfdf9ff1c578f7209831bccf20451e7969e14c045560fc7810f8b3896e3d21b7","source":{"kind":"arxiv","id":"1807.08481","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.08481","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"arxiv_version","alias_value":"1807.08481v1","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.08481","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"pith_short_12","alias_value":"Z7PZ74OFPD3S","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"Z7PZ74OFPD3SBGBR","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"Z7PZ74OF","created_at":"2026-05-18T12:33:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:Z7PZ74OFPD3SBGBRXTHSARI6PF","target":"record","payload":{"canonical_record":{"source":{"id":"1807.08481","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-07-23T08:35:04Z","cross_cats_sorted":[],"title_canon_sha256":"75e8a1be25d235889bf3b7764ca233da8bc189589917706fab5ce84bb6e3d821","abstract_canon_sha256":"2c6d862bb608e388b06745fcbd6267aade3c760139b7524c49c0e9d4c14cc831"},"schema_version":"1.0"},"canonical_sha256":"cfdf9ff1c578f7209831bccf20451e7969e14c045560fc7810f8b3896e3d21b7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:55.401268Z","signature_b64":"vTTmxjR68iAYmPqqVXeTswns16ObKcJsoJWlX54iAQB4ZV84zaAELVA0shjdqUn/P3+EdsbtmYA34ML0FQ9VCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cfdf9ff1c578f7209831bccf20451e7969e14c045560fc7810f8b3896e3d21b7","last_reissued_at":"2026-05-18T00:04:55.400618Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:55.400618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.08481","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":"2026-05-18T00:04:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UAKN+5TlSA9k+uDRCDDx2Q4hhyFkOGiCyfl5h/heCLQT4rGoTF8XoEk3kT2atSRbg8R63cfbyWoZiSLBFVwABA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:28:07.619063Z"},"content_sha256":"b7f9245fd9f55fa588b33373c9f591bd290446e8d643bfcec10b3a1e5ac0bfa2","schema_version":"1.0","event_id":"sha256:b7f9245fd9f55fa588b33373c9f591bd290446e8d643bfcec10b3a1e5ac0bfa2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:Z7PZ74OFPD3SBGBRXTHSARI6PF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bias dependent spin injection into graphene on YIG through bilayer hBN tunnel barriers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"A.A. Kaverzin, B.J. van Wees, J.C. Leutenantsmeyer, M. Gurram, T. Liu","submitted_at":"2018-07-23T08:35:04Z","abstract_excerpt":"We study the spin injection efficiency into single and bilayer graphene on the ferrimagnetic insulator Yttrium-Iron-Garnet (YIG) through an exfoliated tunnel barrier of bilayer hexagonal boron nitride (hBN). The contacts of two samples yield a resistance-area product between 5 and 30 k$\\Omega\\mu$m$^2$. Depending on an applied DC bias current, the magnitude of the non-local spin signal can be increased or suppressed below the noise level. The spin injection efficiency reaches values from -60% to +25%. The results are confirmed with both spin valve and spin precession measurements. The proximity"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.08481","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":"2026-05-18T00:04:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0VeyX+x+3g9dTGpuIpI4LBSuX/N+uPvaITAQD24BcqtoKXSWlkzWEn6LY0xoLA4xXwBHWZI+BXCvl5or9cCSAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:28:07.619687Z"},"content_sha256":"e08bf1b47a02cbd9267f8858d2e71bb1014229fa3284ba2141d492cd62a3f409","schema_version":"1.0","event_id":"sha256:e08bf1b47a02cbd9267f8858d2e71bb1014229fa3284ba2141d492cd62a3f409"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z7PZ74OFPD3SBGBRXTHSARI6PF/bundle.json","state_url":"https://pith.science/pith/Z7PZ74OFPD3SBGBRXTHSARI6PF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z7PZ74OFPD3SBGBRXTHSARI6PF/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":"2026-05-30T22:28:07Z","links":{"resolver":"https://pith.science/pith/Z7PZ74OFPD3SBGBRXTHSARI6PF","bundle":"https://pith.science/pith/Z7PZ74OFPD3SBGBRXTHSARI6PF/bundle.json","state":"https://pith.science/pith/Z7PZ74OFPD3SBGBRXTHSARI6PF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z7PZ74OFPD3SBGBRXTHSARI6PF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:Z7PZ74OFPD3SBGBRXTHSARI6PF","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":"2c6d862bb608e388b06745fcbd6267aade3c760139b7524c49c0e9d4c14cc831","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-07-23T08:35:04Z","title_canon_sha256":"75e8a1be25d235889bf3b7764ca233da8bc189589917706fab5ce84bb6e3d821"},"schema_version":"1.0","source":{"id":"1807.08481","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.08481","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"arxiv_version","alias_value":"1807.08481v1","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.08481","created_at":"2026-05-18T00:04:55Z"},{"alias_kind":"pith_short_12","alias_value":"Z7PZ74OFPD3S","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"Z7PZ74OFPD3SBGBR","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"Z7PZ74OF","created_at":"2026-05-18T12:33:04Z"}],"graph_snapshots":[{"event_id":"sha256:e08bf1b47a02cbd9267f8858d2e71bb1014229fa3284ba2141d492cd62a3f409","target":"graph","created_at":"2026-05-18T00:04:55Z","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 the spin injection efficiency into single and bilayer graphene on the ferrimagnetic insulator Yttrium-Iron-Garnet (YIG) through an exfoliated tunnel barrier of bilayer hexagonal boron nitride (hBN). The contacts of two samples yield a resistance-area product between 5 and 30 k$\\Omega\\mu$m$^2$. Depending on an applied DC bias current, the magnitude of the non-local spin signal can be increased or suppressed below the noise level. The spin injection efficiency reaches values from -60% to +25%. The results are confirmed with both spin valve and spin precession measurements. The proximity","authors_text":"A.A. Kaverzin, B.J. van Wees, J.C. Leutenantsmeyer, M. Gurram, T. Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-07-23T08:35:04Z","title":"Bias dependent spin injection into graphene on YIG through bilayer hBN tunnel barriers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.08481","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:b7f9245fd9f55fa588b33373c9f591bd290446e8d643bfcec10b3a1e5ac0bfa2","target":"record","created_at":"2026-05-18T00:04:55Z","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":"2c6d862bb608e388b06745fcbd6267aade3c760139b7524c49c0e9d4c14cc831","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-07-23T08:35:04Z","title_canon_sha256":"75e8a1be25d235889bf3b7764ca233da8bc189589917706fab5ce84bb6e3d821"},"schema_version":"1.0","source":{"id":"1807.08481","kind":"arxiv","version":1}},"canonical_sha256":"cfdf9ff1c578f7209831bccf20451e7969e14c045560fc7810f8b3896e3d21b7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cfdf9ff1c578f7209831bccf20451e7969e14c045560fc7810f8b3896e3d21b7","first_computed_at":"2026-05-18T00:04:55.400618Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:55.400618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vTTmxjR68iAYmPqqVXeTswns16ObKcJsoJWlX54iAQB4ZV84zaAELVA0shjdqUn/P3+EdsbtmYA34ML0FQ9VCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:55.401268Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.08481","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7f9245fd9f55fa588b33373c9f591bd290446e8d643bfcec10b3a1e5ac0bfa2","sha256:e08bf1b47a02cbd9267f8858d2e71bb1014229fa3284ba2141d492cd62a3f409"],"state_sha256":"a1e6926eebc280ddeced7d85e905e38dbb1c97411cc49263dd620ab650599eed"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gVqhg0f0i83P/2gsrHjjEMM3MQXSflzXIQo+8BQtTrQ9TO0CDWzhQ5JwhWfH6Qq4b0dwlq34Ter3DngmwkNpAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:28:07.623006Z","bundle_sha256":"2eebcfcba9d7b60002fd446fef752c1fb4f208ebd2456636758dbf4bb5d2ca50"}}