{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:JIJ77ES5ZW6VFU2NIUDY4WK5H6","short_pith_number":"pith:JIJ77ES5","canonical_record":{"source":{"id":"1508.00164","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-08-01T20:19:56Z","cross_cats_sorted":[],"title_canon_sha256":"1f7129cb0d3049a11ee04ed9e8ede6a03e709acf30a3dc3c67aff177979234f6","abstract_canon_sha256":"221d24adcab1124baa9777a662eba878bd060c5a34a7beeb77756d51dd4994ac"},"schema_version":"1.0"},"canonical_sha256":"4a13ff925dcdbd52d34d45078e595d3f8a943f7906c22d3fe6f7d42370c90846","source":{"kind":"arxiv","id":"1508.00164","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00164","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00164v1","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00164","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"pith_short_12","alias_value":"JIJ77ES5ZW6V","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JIJ77ES5ZW6VFU2N","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JIJ77ES5","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:JIJ77ES5ZW6VFU2NIUDY4WK5H6","target":"record","payload":{"canonical_record":{"source":{"id":"1508.00164","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-08-01T20:19:56Z","cross_cats_sorted":[],"title_canon_sha256":"1f7129cb0d3049a11ee04ed9e8ede6a03e709acf30a3dc3c67aff177979234f6","abstract_canon_sha256":"221d24adcab1124baa9777a662eba878bd060c5a34a7beeb77756d51dd4994ac"},"schema_version":"1.0"},"canonical_sha256":"4a13ff925dcdbd52d34d45078e595d3f8a943f7906c22d3fe6f7d42370c90846","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:18:43.880731Z","signature_b64":"k31ss6yHuC7Ns2YVY081gywkqeEorWM/fn65506pBQa2gQ0OWZoAoiZG7B8kKUyE7RhhvwhpnLVe5jwF7ORYCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4a13ff925dcdbd52d34d45078e595d3f8a943f7906c22d3fe6f7d42370c90846","last_reissued_at":"2026-05-18T01:18:43.880044Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:18:43.880044Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.00164","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":"2026-05-18T01:18:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4VG+rFXwE9n5Bzz3LD+TIOTUzJrGodG+iFmGzZxlyA8+Qm/kUjjVfBfd4PGlr5whJ6mj1PmXPzu/WuKWLUM0CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T02:36:58.414423Z"},"content_sha256":"edfe69085c3f5f2f574de210af2f1418776d659124d573d508eeb533df192c9f","schema_version":"1.0","event_id":"sha256:edfe69085c3f5f2f574de210af2f1418776d659124d573d508eeb533df192c9f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:JIJ77ES5ZW6VFU2NIUDY4WK5H6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exchange-driven spin relaxation in ferromagnet/oxide/semiconductor heterostructures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"E. Johnston-Halperin, Matthew Sheffield, M. E. Flatt\\'e, Michael Chilcote, N. J. Harmon, Patrick Odenthal, R. K. Kawakami, Yi-Hsin Chiu, Yu-Sheng Ou","submitted_at":"2015-08-01T20:19:56Z","abstract_excerpt":"We investigate electron spin relaxation in GaAs in the proximity of a Fe/MgO layer using spin-resolved optical pump-probe spectroscopy, revealing a strong dependence of the spin relaxation time on the strength of an exchange-driven hyperfine field. The temperature dependence of this effect reveals a strong correlation with carrier freeze out, implying that at low temperatures the free carrier spin lifetime is dominated by inhomogeneity in the local hyperfine field due to carrier localization. This result resolves a long-standing and contentious question of the origin of the spin relaxation in "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00164","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":"2026-05-18T01:18:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kZuZUqNCxgLlYXr8Oo3HNmY1QKthK0PLjzeP9cLbJuAX06Dsl0JO8UVsMVwOPE4+TKEo9I48qNZqBVLVjIg8BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T02:36:58.415103Z"},"content_sha256":"b0dccccd960bedca6833b48df21c88a69a48b37a6e6b02b7ee916d946b41976b","schema_version":"1.0","event_id":"sha256:b0dccccd960bedca6833b48df21c88a69a48b37a6e6b02b7ee916d946b41976b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JIJ77ES5ZW6VFU2NIUDY4WK5H6/bundle.json","state_url":"https://pith.science/pith/JIJ77ES5ZW6VFU2NIUDY4WK5H6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JIJ77ES5ZW6VFU2NIUDY4WK5H6/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":"2026-05-31T02:36:58Z","links":{"resolver":"https://pith.science/pith/JIJ77ES5ZW6VFU2NIUDY4WK5H6","bundle":"https://pith.science/pith/JIJ77ES5ZW6VFU2NIUDY4WK5H6/bundle.json","state":"https://pith.science/pith/JIJ77ES5ZW6VFU2NIUDY4WK5H6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JIJ77ES5ZW6VFU2NIUDY4WK5H6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:JIJ77ES5ZW6VFU2NIUDY4WK5H6","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":"221d24adcab1124baa9777a662eba878bd060c5a34a7beeb77756d51dd4994ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-08-01T20:19:56Z","title_canon_sha256":"1f7129cb0d3049a11ee04ed9e8ede6a03e709acf30a3dc3c67aff177979234f6"},"schema_version":"1.0","source":{"id":"1508.00164","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00164","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00164v1","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00164","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"pith_short_12","alias_value":"JIJ77ES5ZW6V","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JIJ77ES5ZW6VFU2N","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JIJ77ES5","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:b0dccccd960bedca6833b48df21c88a69a48b37a6e6b02b7ee916d946b41976b","target":"graph","created_at":"2026-05-18T01:18:43Z","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 investigate electron spin relaxation in GaAs in the proximity of a Fe/MgO layer using spin-resolved optical pump-probe spectroscopy, revealing a strong dependence of the spin relaxation time on the strength of an exchange-driven hyperfine field. The temperature dependence of this effect reveals a strong correlation with carrier freeze out, implying that at low temperatures the free carrier spin lifetime is dominated by inhomogeneity in the local hyperfine field due to carrier localization. This result resolves a long-standing and contentious question of the origin of the spin relaxation in ","authors_text":"E. Johnston-Halperin, Matthew Sheffield, M. E. Flatt\\'e, Michael Chilcote, N. J. Harmon, Patrick Odenthal, R. K. Kawakami, Yi-Hsin Chiu, Yu-Sheng Ou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-08-01T20:19:56Z","title":"Exchange-driven spin relaxation in ferromagnet/oxide/semiconductor heterostructures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00164","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:edfe69085c3f5f2f574de210af2f1418776d659124d573d508eeb533df192c9f","target":"record","created_at":"2026-05-18T01:18:43Z","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":"221d24adcab1124baa9777a662eba878bd060c5a34a7beeb77756d51dd4994ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-08-01T20:19:56Z","title_canon_sha256":"1f7129cb0d3049a11ee04ed9e8ede6a03e709acf30a3dc3c67aff177979234f6"},"schema_version":"1.0","source":{"id":"1508.00164","kind":"arxiv","version":1}},"canonical_sha256":"4a13ff925dcdbd52d34d45078e595d3f8a943f7906c22d3fe6f7d42370c90846","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4a13ff925dcdbd52d34d45078e595d3f8a943f7906c22d3fe6f7d42370c90846","first_computed_at":"2026-05-18T01:18:43.880044Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:43.880044Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"k31ss6yHuC7Ns2YVY081gywkqeEorWM/fn65506pBQa2gQ0OWZoAoiZG7B8kKUyE7RhhvwhpnLVe5jwF7ORYCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:43.880731Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.00164","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:edfe69085c3f5f2f574de210af2f1418776d659124d573d508eeb533df192c9f","sha256:b0dccccd960bedca6833b48df21c88a69a48b37a6e6b02b7ee916d946b41976b"],"state_sha256":"9855614838715a8be85a0c6b4302b391e14eadf35b47b15af6e1310e3f2c58ec"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LvEqJHIq/CaJajad3p3aGWZQE/Y85niYvBoic+OZTnshtXQCrGJJaa4tN9J5ykfdXOVm58tSDqRh0HAO4uyYBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T02:36:58.418606Z","bundle_sha256":"b3fa665e3497115c3ea376cd0722e6e4102703140e88385440705b1060b871d5"}}