{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:2WPH2OMAENW52HDJHJV2Z7L2SY","short_pith_number":"pith:2WPH2OMA","canonical_record":{"source":{"id":"1712.07828","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-12-21T08:29:30Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"351e12e8a7f45172015f21294ff473e5829a08b047e189fabe28ab1af8684694","abstract_canon_sha256":"f6bcb03a68e5697a9185203478206cc61c0015704e9d7e8e27c2852fa6b4c53e"},"schema_version":"1.0"},"canonical_sha256":"d59e7d3980236ddd1c693a6bacfd7a96154cca4e844f7f59bd91aea6004f30ce","source":{"kind":"arxiv","id":"1712.07828","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.07828","created_at":"2026-05-18T00:12:32Z"},{"alias_kind":"arxiv_version","alias_value":"1712.07828v1","created_at":"2026-05-18T00:12:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.07828","created_at":"2026-05-18T00:12:32Z"},{"alias_kind":"pith_short_12","alias_value":"2WPH2OMAENW5","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2WPH2OMAENW52HDJ","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2WPH2OMA","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:2WPH2OMAENW52HDJHJV2Z7L2SY","target":"record","payload":{"canonical_record":{"source":{"id":"1712.07828","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-12-21T08:29:30Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"351e12e8a7f45172015f21294ff473e5829a08b047e189fabe28ab1af8684694","abstract_canon_sha256":"f6bcb03a68e5697a9185203478206cc61c0015704e9d7e8e27c2852fa6b4c53e"},"schema_version":"1.0"},"canonical_sha256":"d59e7d3980236ddd1c693a6bacfd7a96154cca4e844f7f59bd91aea6004f30ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:32.518422Z","signature_b64":"m+QdPP0YZbLknxyBhSLUXyxhOCJunBQ0RFp2yrkRVuOJ80e6kkj8DU2HhcMlxvYihSZByEGgX7X/N4gYMkhEDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d59e7d3980236ddd1c693a6bacfd7a96154cca4e844f7f59bd91aea6004f30ce","last_reissued_at":"2026-05-18T00:12:32.517907Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:32.517907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.07828","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":"2026-05-18T00:12:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ezazjUxkWZrSpvvungfuLnrI79H+ueDRBbftraX04omZn7O6jnDxavoEPn3WQGajShORYgq8kZnunbkIQNAuDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:06:45.280186Z"},"content_sha256":"228bd77b333e60f96762d3b1fef48da3c80d4a0aee207e9ee9fbcc5fd6b7a245","schema_version":"1.0","event_id":"sha256:228bd77b333e60f96762d3b1fef48da3c80d4a0aee207e9ee9fbcc5fd6b7a245"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:2WPH2OMAENW52HDJHJV2Z7L2SY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electrical spin injection, transport, and detection in graphene-hexagonal boron nitride van der Waals heterostructures: progress and perspectives","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Bart J. van Wees, Mallikarjuna Gurram, Siddhartha Omar","submitted_at":"2017-12-21T08:29:30Z","abstract_excerpt":"The current research in graphene spintronics strives for achieving a long spin lifetime, and efficient spin injection and detection in graphene. In this article, we review how hexagonal boron nitride (hBN) has evolved as a crucial substrate, as an encapsulation layer, and as a tunnel barrier for manipulation and control of spin lifetimes and spin injection/detection polarizations in graphene spin valve devices. First, we give an overview of the challenges due to conventional SiO$_2$ substrate for spin transport in graphene followed by the progress made in hBN based graphene heterostructures. T"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.07828","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":"2026-05-18T00:12:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PW7ccYdLSo4/yTNNZc8ds46wPxDw+V++B0l9KxUWHgnsUzU0glYFJYcjQi33WNzSzoafVnlp+yeU2jPUxiX3AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:06:45.280860Z"},"content_sha256":"c07d07e55e690b17657e2cbdb2df9170a7036076ce9b8df14c483b2395a1655d","schema_version":"1.0","event_id":"sha256:c07d07e55e690b17657e2cbdb2df9170a7036076ce9b8df14c483b2395a1655d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2WPH2OMAENW52HDJHJV2Z7L2SY/bundle.json","state_url":"https://pith.science/pith/2WPH2OMAENW52HDJHJV2Z7L2SY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2WPH2OMAENW52HDJHJV2Z7L2SY/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":"2026-05-27T08:06:45Z","links":{"resolver":"https://pith.science/pith/2WPH2OMAENW52HDJHJV2Z7L2SY","bundle":"https://pith.science/pith/2WPH2OMAENW52HDJHJV2Z7L2SY/bundle.json","state":"https://pith.science/pith/2WPH2OMAENW52HDJHJV2Z7L2SY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2WPH2OMAENW52HDJHJV2Z7L2SY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:2WPH2OMAENW52HDJHJV2Z7L2SY","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":"f6bcb03a68e5697a9185203478206cc61c0015704e9d7e8e27c2852fa6b4c53e","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-12-21T08:29:30Z","title_canon_sha256":"351e12e8a7f45172015f21294ff473e5829a08b047e189fabe28ab1af8684694"},"schema_version":"1.0","source":{"id":"1712.07828","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.07828","created_at":"2026-05-18T00:12:32Z"},{"alias_kind":"arxiv_version","alias_value":"1712.07828v1","created_at":"2026-05-18T00:12:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.07828","created_at":"2026-05-18T00:12:32Z"},{"alias_kind":"pith_short_12","alias_value":"2WPH2OMAENW5","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2WPH2OMAENW52HDJ","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2WPH2OMA","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:c07d07e55e690b17657e2cbdb2df9170a7036076ce9b8df14c483b2395a1655d","target":"graph","created_at":"2026-05-18T00:12:32Z","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":"The current research in graphene spintronics strives for achieving a long spin lifetime, and efficient spin injection and detection in graphene. In this article, we review how hexagonal boron nitride (hBN) has evolved as a crucial substrate, as an encapsulation layer, and as a tunnel barrier for manipulation and control of spin lifetimes and spin injection/detection polarizations in graphene spin valve devices. First, we give an overview of the challenges due to conventional SiO$_2$ substrate for spin transport in graphene followed by the progress made in hBN based graphene heterostructures. T","authors_text":"Bart J. van Wees, Mallikarjuna Gurram, Siddhartha Omar","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-12-21T08:29:30Z","title":"Electrical spin injection, transport, and detection in graphene-hexagonal boron nitride van der Waals heterostructures: progress and perspectives"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.07828","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":"sha256:228bd77b333e60f96762d3b1fef48da3c80d4a0aee207e9ee9fbcc5fd6b7a245","target":"record","created_at":"2026-05-18T00:12:32Z","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":"f6bcb03a68e5697a9185203478206cc61c0015704e9d7e8e27c2852fa6b4c53e","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-12-21T08:29:30Z","title_canon_sha256":"351e12e8a7f45172015f21294ff473e5829a08b047e189fabe28ab1af8684694"},"schema_version":"1.0","source":{"id":"1712.07828","kind":"arxiv","version":1}},"canonical_sha256":"d59e7d3980236ddd1c693a6bacfd7a96154cca4e844f7f59bd91aea6004f30ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d59e7d3980236ddd1c693a6bacfd7a96154cca4e844f7f59bd91aea6004f30ce","first_computed_at":"2026-05-18T00:12:32.517907Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:12:32.517907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"m+QdPP0YZbLknxyBhSLUXyxhOCJunBQ0RFp2yrkRVuOJ80e6kkj8DU2HhcMlxvYihSZByEGgX7X/N4gYMkhEDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:12:32.518422Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.07828","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:228bd77b333e60f96762d3b1fef48da3c80d4a0aee207e9ee9fbcc5fd6b7a245","sha256:c07d07e55e690b17657e2cbdb2df9170a7036076ce9b8df14c483b2395a1655d"],"state_sha256":"c7b3b3e7728c0bbf594595ab351369f9a8ddce278e39aa6e5601fd4ed42e8bc5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hTySaUOaU7bSn5aYmEKJ60ZR5z3P2G7GQxwGtLR1cgHhJAhi4CdPls4CAIycjQLHCe+Bptgkhmm1qJOeoMIVDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T08:06:45.284622Z","bundle_sha256":"3d910f61010b6d8c4b6f3f3c1e32396faaf0bc22d87153441ec5e1b069c7b69e"}}