{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:NTR6AAEPOSV7O3RLRKYUVL7IQ5","short_pith_number":"pith:NTR6AAEP","canonical_record":{"source":{"id":"1404.4527","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-04-17T13:54:55Z","cross_cats_sorted":[],"title_canon_sha256":"2bcd03169202d6f1be3522d618571839ad09db738b49d804045cf04f81bbb071","abstract_canon_sha256":"b54ba5b1b91d052979bb9e2f6456df6bf7b6a48df9fc0ee0535230d96c0a455a"},"schema_version":"1.0"},"canonical_sha256":"6ce3e0008f74abf76e2b8ab14aafe88775f0175182d9cc1be0c790740060a45c","source":{"kind":"arxiv","id":"1404.4527","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.4527","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"arxiv_version","alias_value":"1404.4527v1","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.4527","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"pith_short_12","alias_value":"NTR6AAEPOSV7","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"NTR6AAEPOSV7O3RL","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"NTR6AAEP","created_at":"2026-05-18T12:28:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:NTR6AAEPOSV7O3RLRKYUVL7IQ5","target":"record","payload":{"canonical_record":{"source":{"id":"1404.4527","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-04-17T13:54:55Z","cross_cats_sorted":[],"title_canon_sha256":"2bcd03169202d6f1be3522d618571839ad09db738b49d804045cf04f81bbb071","abstract_canon_sha256":"b54ba5b1b91d052979bb9e2f6456df6bf7b6a48df9fc0ee0535230d96c0a455a"},"schema_version":"1.0"},"canonical_sha256":"6ce3e0008f74abf76e2b8ab14aafe88775f0175182d9cc1be0c790740060a45c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:43:28.930680Z","signature_b64":"a7twfQRvOSThg945xbZWDdOuA9uBE+o6OA73ZCkBP7EIcaW23c/F6+9S5MuqfPVyWJ5xiS56gF0DIFF8jIvlCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6ce3e0008f74abf76e2b8ab14aafe88775f0175182d9cc1be0c790740060a45c","last_reissued_at":"2026-05-18T01:43:28.929926Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:43:28.929926Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.4527","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":"2026-05-18T01:43:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F8q6UaZolRRStHlgUfS78ua1EMIWz1TiZD2WcjUtlnuxV3r74uxCQdxHHxYXG29rGl4yN33jJLYykgp73YfDBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:23:25.472175Z"},"content_sha256":"eb16f0e6bf8f3d2ebfb2d89e8a29f08644edebe66b1de2578b71b891f14f9320","schema_version":"1.0","event_id":"sha256:eb16f0e6bf8f3d2ebfb2d89e8a29f08644edebe66b1de2578b71b891f14f9320"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:NTR6AAEPOSV7O3RLRKYUVL7IQ5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Large and robust electrical spin injection into GaAs at zero magnetic field using an ultrathin CoFeB/MgO injector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Hallal, B. Xu, D. Liu, H. Jaffr\\`es, H. Liu, H. Yang, J. Frougier, J.M. George, M. Chshiev, M. Hehn, M. Vidal, P. Barate, P. Renucci, S. Liang, S. Mangin, T. Amand, T.T. Zhang, X.Devaux, X. Han, X. Marie, Y. Lu, Z. Wang","submitted_at":"2014-04-17T13:54:55Z","abstract_excerpt":"We demonstrate a large electrical spin injection into GaAs at zero magnetic field thanks to an ultrathin perpendicularly magnetized CoFeB contact of a few atomic planes (1.2 nm). The spin-polarization of electrons injected into GaAs was examined by the circular polarization of electroluminescence from a Spin Light Emitting Diode with embedded InGaAs/GaAs quantum wells. The electroluminescence polarization as a function of the magnetic field closely traces the out-of-plane magnetization of the CoFeB/MgO injector. A circular polarization degree of the emitted light as large as 20% at 25 K is ach"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.4527","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":"2026-05-18T01:43:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kAgfYW+Kco4uxxSLD6DSs9+w9Dr9YDz53pLxWogbwQuVzKUguibVgbmYMM8Lz81mdem6wJYZpB5BQtOr1xqKDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:23:25.472831Z"},"content_sha256":"81f69a4c2920f0c07c578e6c43e9bafcf06735faf47316a3e89327f5102681b0","schema_version":"1.0","event_id":"sha256:81f69a4c2920f0c07c578e6c43e9bafcf06735faf47316a3e89327f5102681b0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NTR6AAEPOSV7O3RLRKYUVL7IQ5/bundle.json","state_url":"https://pith.science/pith/NTR6AAEPOSV7O3RLRKYUVL7IQ5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NTR6AAEPOSV7O3RLRKYUVL7IQ5/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":"2026-05-27T13:23:25Z","links":{"resolver":"https://pith.science/pith/NTR6AAEPOSV7O3RLRKYUVL7IQ5","bundle":"https://pith.science/pith/NTR6AAEPOSV7O3RLRKYUVL7IQ5/bundle.json","state":"https://pith.science/pith/NTR6AAEPOSV7O3RLRKYUVL7IQ5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NTR6AAEPOSV7O3RLRKYUVL7IQ5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:NTR6AAEPOSV7O3RLRKYUVL7IQ5","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":"b54ba5b1b91d052979bb9e2f6456df6bf7b6a48df9fc0ee0535230d96c0a455a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-04-17T13:54:55Z","title_canon_sha256":"2bcd03169202d6f1be3522d618571839ad09db738b49d804045cf04f81bbb071"},"schema_version":"1.0","source":{"id":"1404.4527","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.4527","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"arxiv_version","alias_value":"1404.4527v1","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.4527","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"pith_short_12","alias_value":"NTR6AAEPOSV7","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"NTR6AAEPOSV7O3RL","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"NTR6AAEP","created_at":"2026-05-18T12:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:81f69a4c2920f0c07c578e6c43e9bafcf06735faf47316a3e89327f5102681b0","target":"graph","created_at":"2026-05-18T01:43:28Z","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 demonstrate a large electrical spin injection into GaAs at zero magnetic field thanks to an ultrathin perpendicularly magnetized CoFeB contact of a few atomic planes (1.2 nm). The spin-polarization of electrons injected into GaAs was examined by the circular polarization of electroluminescence from a Spin Light Emitting Diode with embedded InGaAs/GaAs quantum wells. The electroluminescence polarization as a function of the magnetic field closely traces the out-of-plane magnetization of the CoFeB/MgO injector. A circular polarization degree of the emitted light as large as 20% at 25 K is ach","authors_text":"A. Hallal, B. Xu, D. Liu, H. Jaffr\\`es, H. Liu, H. Yang, J. Frougier, J.M. George, M. Chshiev, M. Hehn, M. Vidal, P. Barate, P. Renucci, S. Liang, S. Mangin, T. Amand, T.T. Zhang, X.Devaux, X. Han, X. Marie, Y. Lu, Z. Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-04-17T13:54:55Z","title":"Large and robust electrical spin injection into GaAs at zero magnetic field using an ultrathin CoFeB/MgO injector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.4527","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:eb16f0e6bf8f3d2ebfb2d89e8a29f08644edebe66b1de2578b71b891f14f9320","target":"record","created_at":"2026-05-18T01:43:28Z","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":"b54ba5b1b91d052979bb9e2f6456df6bf7b6a48df9fc0ee0535230d96c0a455a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-04-17T13:54:55Z","title_canon_sha256":"2bcd03169202d6f1be3522d618571839ad09db738b49d804045cf04f81bbb071"},"schema_version":"1.0","source":{"id":"1404.4527","kind":"arxiv","version":1}},"canonical_sha256":"6ce3e0008f74abf76e2b8ab14aafe88775f0175182d9cc1be0c790740060a45c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6ce3e0008f74abf76e2b8ab14aafe88775f0175182d9cc1be0c790740060a45c","first_computed_at":"2026-05-18T01:43:28.929926Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:28.929926Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"a7twfQRvOSThg945xbZWDdOuA9uBE+o6OA73ZCkBP7EIcaW23c/F6+9S5MuqfPVyWJ5xiS56gF0DIFF8jIvlCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:28.930680Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.4527","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb16f0e6bf8f3d2ebfb2d89e8a29f08644edebe66b1de2578b71b891f14f9320","sha256:81f69a4c2920f0c07c578e6c43e9bafcf06735faf47316a3e89327f5102681b0"],"state_sha256":"92d5525a2579f387a229f1b45a236c39d50d515e265a7b7f4e492c0a33764dee"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SvtOq+UYasgigpZMTqyrriiY1f0KhasuZjqwAOfI+pRzOrv7FHE99EOB+ck35WJcJONMPeZaoxzDNGJCNO8mBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T13:23:25.475999Z","bundle_sha256":"bcebdfc022662380670cfe0e238acae5a8519fc2ee4dcbc98266bc6dc6509b52"}}