{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:VH3G3OHYGD52AWVFRVPZJVH6ON","short_pith_number":"pith:VH3G3OHY","canonical_record":{"source":{"id":"0905.1384","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-05-09T07:40:50Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"2c752145e2be6bca6bf0e8834921d6bc656539dc57238391129280ee1b571511","abstract_canon_sha256":"a7da7c0b0e858712152fc2a15606fbd69252c1e72130aa2b21bdf4469ee86ace"},"schema_version":"1.0"},"canonical_sha256":"a9f66db8f830fba05aa58d5f94d4fe7347ec0f0919079680f1ea6bb30619dc0d","source":{"kind":"arxiv","id":"0905.1384","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.1384","created_at":"2026-05-18T02:13:46Z"},{"alias_kind":"arxiv_version","alias_value":"0905.1384v1","created_at":"2026-05-18T02:13:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.1384","created_at":"2026-05-18T02:13:46Z"},{"alias_kind":"pith_short_12","alias_value":"VH3G3OHYGD52","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"VH3G3OHYGD52AWVF","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"VH3G3OHY","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:VH3G3OHYGD52AWVFRVPZJVH6ON","target":"record","payload":{"canonical_record":{"source":{"id":"0905.1384","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-05-09T07:40:50Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"2c752145e2be6bca6bf0e8834921d6bc656539dc57238391129280ee1b571511","abstract_canon_sha256":"a7da7c0b0e858712152fc2a15606fbd69252c1e72130aa2b21bdf4469ee86ace"},"schema_version":"1.0"},"canonical_sha256":"a9f66db8f830fba05aa58d5f94d4fe7347ec0f0919079680f1ea6bb30619dc0d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:46.202417Z","signature_b64":"q8HRr8rUWlYd6CiOkLpSWyPoUhKw4mn6fKkRzJza4c3b84YFDdqoUP/X75vYY0QIFs3N0B2hwwwtNofo3ZMMDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a9f66db8f830fba05aa58d5f94d4fe7347ec0f0919079680f1ea6bb30619dc0d","last_reissued_at":"2026-05-18T02:13:46.201706Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:46.201706Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0905.1384","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":"2026-05-18T02:13:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6gPbVi/6mexJ9bJgCL/PSoQ37Q9L8f9IwOJLzs/IiOYa4bhD5Z8EmfgvTyzwYt+2uT5IBBIsSnVBbJkDp5XRBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T04:48:34.619619Z"},"content_sha256":"fec451a3aa527ab2d158b5bb3cc0532a2b87873100acaf6e7109407570aec8b9","schema_version":"1.0","event_id":"sha256:fec451a3aa527ab2d158b5bb3cc0532a2b87873100acaf6e7109407570aec8b9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:VH3G3OHYGD52AWVFRVPZJVH6ON","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Giant magnetoresistance in semiconductor / granular film heterostructures with cobalt nanoparticles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mes-hall","authors_text":"A.I. Stognij, L.V. Lutsev, N.N. Novitskii","submitted_at":"2009-05-09T07:40:50Z","abstract_excerpt":"We have studied the electron transport in SiO${}_2$(Co)/GaAs and SiO${}_2$(Co)/Si heterostructures, where the SiO${}_2$(Co) structure is the granular SiO${}_2$ film with Co nanoparticles. In SiO${}_2$(Co)/GaAs heterostructures giant magnetoresistance effect is observed. The effect has positive values, is expressed, when electrons are injected from the granular film into the GaAs semiconductor, and has the temperature-peak type character. The temperature location of the effect depends on the Co concentration and can be shifted by the applied electrical field. For the SiO${}_2$(Co)/GaAs heterost"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.1384","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":"2026-05-18T02:13:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rvi8bCuEPy37DljnSwCB9thr9MJBURbWiXkAe665UGnF6Fh8UIoH55pVHXduUUJoJhRwrhRr1YUAlfsM9+7WCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T04:48:34.619962Z"},"content_sha256":"df1c073af0f2c4249771994235880b7ccb08285390c95801a53211ba2e9ebce5","schema_version":"1.0","event_id":"sha256:df1c073af0f2c4249771994235880b7ccb08285390c95801a53211ba2e9ebce5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VH3G3OHYGD52AWVFRVPZJVH6ON/bundle.json","state_url":"https://pith.science/pith/VH3G3OHYGD52AWVFRVPZJVH6ON/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VH3G3OHYGD52AWVFRVPZJVH6ON/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":"2026-06-03T04:48:34Z","links":{"resolver":"https://pith.science/pith/VH3G3OHYGD52AWVFRVPZJVH6ON","bundle":"https://pith.science/pith/VH3G3OHYGD52AWVFRVPZJVH6ON/bundle.json","state":"https://pith.science/pith/VH3G3OHYGD52AWVFRVPZJVH6ON/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VH3G3OHYGD52AWVFRVPZJVH6ON/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:VH3G3OHYGD52AWVFRVPZJVH6ON","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":"a7da7c0b0e858712152fc2a15606fbd69252c1e72130aa2b21bdf4469ee86ace","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-05-09T07:40:50Z","title_canon_sha256":"2c752145e2be6bca6bf0e8834921d6bc656539dc57238391129280ee1b571511"},"schema_version":"1.0","source":{"id":"0905.1384","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.1384","created_at":"2026-05-18T02:13:46Z"},{"alias_kind":"arxiv_version","alias_value":"0905.1384v1","created_at":"2026-05-18T02:13:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.1384","created_at":"2026-05-18T02:13:46Z"},{"alias_kind":"pith_short_12","alias_value":"VH3G3OHYGD52","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"VH3G3OHYGD52AWVF","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"VH3G3OHY","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:df1c073af0f2c4249771994235880b7ccb08285390c95801a53211ba2e9ebce5","target":"graph","created_at":"2026-05-18T02:13:46Z","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 have studied the electron transport in SiO${}_2$(Co)/GaAs and SiO${}_2$(Co)/Si heterostructures, where the SiO${}_2$(Co) structure is the granular SiO${}_2$ film with Co nanoparticles. In SiO${}_2$(Co)/GaAs heterostructures giant magnetoresistance effect is observed. The effect has positive values, is expressed, when electrons are injected from the granular film into the GaAs semiconductor, and has the temperature-peak type character. The temperature location of the effect depends on the Co concentration and can be shifted by the applied electrical field. For the SiO${}_2$(Co)/GaAs heterost","authors_text":"A.I. Stognij, L.V. Lutsev, N.N. Novitskii","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-05-09T07:40:50Z","title":"Giant magnetoresistance in semiconductor / granular film heterostructures with cobalt nanoparticles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.1384","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:fec451a3aa527ab2d158b5bb3cc0532a2b87873100acaf6e7109407570aec8b9","target":"record","created_at":"2026-05-18T02:13:46Z","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":"a7da7c0b0e858712152fc2a15606fbd69252c1e72130aa2b21bdf4469ee86ace","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-05-09T07:40:50Z","title_canon_sha256":"2c752145e2be6bca6bf0e8834921d6bc656539dc57238391129280ee1b571511"},"schema_version":"1.0","source":{"id":"0905.1384","kind":"arxiv","version":1}},"canonical_sha256":"a9f66db8f830fba05aa58d5f94d4fe7347ec0f0919079680f1ea6bb30619dc0d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a9f66db8f830fba05aa58d5f94d4fe7347ec0f0919079680f1ea6bb30619dc0d","first_computed_at":"2026-05-18T02:13:46.201706Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:46.201706Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q8HRr8rUWlYd6CiOkLpSWyPoUhKw4mn6fKkRzJza4c3b84YFDdqoUP/X75vYY0QIFs3N0B2hwwwtNofo3ZMMDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:46.202417Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.1384","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fec451a3aa527ab2d158b5bb3cc0532a2b87873100acaf6e7109407570aec8b9","sha256:df1c073af0f2c4249771994235880b7ccb08285390c95801a53211ba2e9ebce5"],"state_sha256":"3af19dfdf60d52c8d7d7ab2ff868e3d73c8f0ac3e0ccbc47fb77a9021103d7a0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h0NK6e5PG3ZNzG6ysfB6kPuxNJ8yL25yacrGjXcxqHRwh8d8MvqG9kZIqidrEUvHfLIvhoXgHgyZ+Jugzxz+Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T04:48:34.622164Z","bundle_sha256":"29f8e9bb2f9ff89c2610ebaf60d2a334c66310fbb4e1f6d1056d8974c66acddd"}}