{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:7K6TASPS5FG3XRZ2NSRVN6R5JB","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":"27ae77f39f721213186164b1e5541963ba430670e7f63a8219f1a895a4f40638","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-04-05T09:35:17Z","title_canon_sha256":"841b9d4a5d43bcc781dec262ae9bf7866a6bfb83b6786d0b700daf386b846259"},"schema_version":"1.0","source":{"id":"1704.01328","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.01328","created_at":"2026-05-18T00:38:03Z"},{"alias_kind":"arxiv_version","alias_value":"1704.01328v1","created_at":"2026-05-18T00:38:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.01328","created_at":"2026-05-18T00:38:03Z"},{"alias_kind":"pith_short_12","alias_value":"7K6TASPS5FG3","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"7K6TASPS5FG3XRZ2","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"7K6TASPS","created_at":"2026-05-18T12:31:05Z"}],"graph_snapshots":[{"event_id":"sha256:7154df35bfbb3ab390ebeeb90645584a99377919c5b4165162e3ab94d4183e4d","target":"graph","created_at":"2026-05-18T00:38:03Z","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 spin transport in a fully hBN encapsulated monolayer-graphene van der Waals (vdW) heterostructure, at room temperature. A top-layer of bilayer-hBN is used as a tunnel barrier for spin-injection and detection in graphene with ferromagnetic cobalt electrodes. We report surprisingly large and bias induced (differential) spin-injection (detection) polarizations up to 50% (135%) at a positive voltage bias of +0.6 V, as well as sign inverted polarizations up to -70% (-60%) at a reverse bias of -0.4 V. This demonstrates the potential of bilayer-hBN tunnel barriers for practical graphene spin","authors_text":"Bart J. van Wees, Mallikarjuna Gurram, Siddhartha Omar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-04-05T09:35:17Z","title":"Bias induced up to 100% spin-injection and detection polarizations in ferromagnet/bilayer-hBN/graphene/hBN heterostructures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.01328","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":"sha256:9cc540d77f8679843b9f4efe7f880c3ad2cdefb9bf0e46eff88e16e0674a51ac","target":"record","created_at":"2026-05-18T00:38:03Z","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":"27ae77f39f721213186164b1e5541963ba430670e7f63a8219f1a895a4f40638","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-04-05T09:35:17Z","title_canon_sha256":"841b9d4a5d43bcc781dec262ae9bf7866a6bfb83b6786d0b700daf386b846259"},"schema_version":"1.0","source":{"id":"1704.01328","kind":"arxiv","version":1}},"canonical_sha256":"fabd3049f2e94dbbc73a6ca356fa3d48788459a3de8e01a486dfd6c412d0826d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fabd3049f2e94dbbc73a6ca356fa3d48788459a3de8e01a486dfd6c412d0826d","first_computed_at":"2026-05-18T00:38:03.108847Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:38:03.108847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"z+eYO3s0QwqKsowQh1f+cuH2RJ2Ne/F9LZ1lJYj4K3Xjj2gQ6TdDiK5gkjPP5vKxZzz9xgV3kqycJsLDBmA3BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:38:03.109540Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.01328","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9cc540d77f8679843b9f4efe7f880c3ad2cdefb9bf0e46eff88e16e0674a51ac","sha256:7154df35bfbb3ab390ebeeb90645584a99377919c5b4165162e3ab94d4183e4d"],"state_sha256":"0f5d96235fe3fa562eb2306a1f72c1014c187e8e47c51f13cb81d65b328e694c"}