{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:QHE77RDYPWTHDFA2I3MUDDFBV2","short_pith_number":"pith:QHE77RDY","canonical_record":{"source":{"id":"0808.0841","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-08-06T14:07:33Z","cross_cats_sorted":["cond-mat.dis-nn"],"title_canon_sha256":"223d933d4329bc61e4709d9abd580d8031155609382dc30b1aa16f46c466181a","abstract_canon_sha256":"187007b6ce57185693515c28bb9199066100acaa4e843cfd9178f3c469fd73ec"},"schema_version":"1.0"},"canonical_sha256":"81c9ffc4787da671941a46d9418ca1ae890df13dbcfc87295060fdd205ff63ff","source":{"kind":"arxiv","id":"0808.0841","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.0841","created_at":"2026-07-04T17:12:15Z"},{"alias_kind":"arxiv_version","alias_value":"0808.0841v1","created_at":"2026-07-04T17:12:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.0841","created_at":"2026-07-04T17:12:15Z"},{"alias_kind":"pith_short_12","alias_value":"QHE77RDYPWTH","created_at":"2026-07-04T17:12:15Z"},{"alias_kind":"pith_short_16","alias_value":"QHE77RDYPWTHDFA2","created_at":"2026-07-04T17:12:15Z"},{"alias_kind":"pith_short_8","alias_value":"QHE77RDY","created_at":"2026-07-04T17:12:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:QHE77RDYPWTHDFA2I3MUDDFBV2","target":"record","payload":{"canonical_record":{"source":{"id":"0808.0841","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-08-06T14:07:33Z","cross_cats_sorted":["cond-mat.dis-nn"],"title_canon_sha256":"223d933d4329bc61e4709d9abd580d8031155609382dc30b1aa16f46c466181a","abstract_canon_sha256":"187007b6ce57185693515c28bb9199066100acaa4e843cfd9178f3c469fd73ec"},"schema_version":"1.0"},"canonical_sha256":"81c9ffc4787da671941a46d9418ca1ae890df13dbcfc87295060fdd205ff63ff","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:12:15.694365Z","signature_b64":"qGKmSkZ9e6nzzdLPXRFfN1kiVmoa38xNBcFvzL5Ii5sp5Bto6sjFZqZCjJIyziq+I+Vgug05f9BbEY62nR9MAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"81c9ffc4787da671941a46d9418ca1ae890df13dbcfc87295060fdd205ff63ff","last_reissued_at":"2026-07-04T17:12:15.694014Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:12:15.694014Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0808.0841","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":"2026-07-04T17:12:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e7J6XD1gWucCTEdEaW+dSN0fmwY1q9Q0W7YKY5Y9Gg/4eSE3BkKn9OGgqqoIFknrTDseRY6I8XlJ3c17yIghDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T05:45:29.919415Z"},"content_sha256":"c978903e84e1789413ddc55f790097ecf4e868ed7571bc6adb3369932204f213","schema_version":"1.0","event_id":"sha256:c978903e84e1789413ddc55f790097ecf4e868ed7571bc6adb3369932204f213"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:QHE77RDYPWTHDFA2I3MUDDFBV2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Surface Magnetoelectric Effect in Ferromagnetic Metal Films","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.dis-nn"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Chun-Gang Duan, E. Y. Tsymbal, Julian P. Velev, Junhao Chu, R. F. Sabirianov, S. S. Jaswal, Ziqiang Zhu","submitted_at":"2008-08-06T14:07:33Z","abstract_excerpt":"A surface magnetoelectric effect is revealed by density-functional calculations that are applied to ferromagnetic Fe(001), Ni(001) and Co(0001) films in the presence of external electric field. The effect originates from spin-dependent screening of the electric field which leads to notable changes in the surface magnetization and the surface magnetocrystalline anisotropy. These results are of considerable interest in the area of electrically-controlled magnetism and magnetoelectric phenomena."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.0841","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0808.0841/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T17:12:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4hjr3vUj2YtCtthErR3Vecbp+/kk/4ugrEW0ODk/ostsB3uSyRT5YgzkGE7MKftQDvkPmUMj62qyKn9fuOnFAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T05:45:29.919792Z"},"content_sha256":"0ca809a707d67dcf839a01bf999875854bc3811080e3d9fe5c1e1d74b735bfbd","schema_version":"1.0","event_id":"sha256:0ca809a707d67dcf839a01bf999875854bc3811080e3d9fe5c1e1d74b735bfbd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QHE77RDYPWTHDFA2I3MUDDFBV2/bundle.json","state_url":"https://pith.science/pith/QHE77RDYPWTHDFA2I3MUDDFBV2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QHE77RDYPWTHDFA2I3MUDDFBV2/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":"2026-07-07T05:45:29Z","links":{"resolver":"https://pith.science/pith/QHE77RDYPWTHDFA2I3MUDDFBV2","bundle":"https://pith.science/pith/QHE77RDYPWTHDFA2I3MUDDFBV2/bundle.json","state":"https://pith.science/pith/QHE77RDYPWTHDFA2I3MUDDFBV2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QHE77RDYPWTHDFA2I3MUDDFBV2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:QHE77RDYPWTHDFA2I3MUDDFBV2","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":"187007b6ce57185693515c28bb9199066100acaa4e843cfd9178f3c469fd73ec","cross_cats_sorted":["cond-mat.dis-nn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-08-06T14:07:33Z","title_canon_sha256":"223d933d4329bc61e4709d9abd580d8031155609382dc30b1aa16f46c466181a"},"schema_version":"1.0","source":{"id":"0808.0841","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.0841","created_at":"2026-07-04T17:12:15Z"},{"alias_kind":"arxiv_version","alias_value":"0808.0841v1","created_at":"2026-07-04T17:12:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.0841","created_at":"2026-07-04T17:12:15Z"},{"alias_kind":"pith_short_12","alias_value":"QHE77RDYPWTH","created_at":"2026-07-04T17:12:15Z"},{"alias_kind":"pith_short_16","alias_value":"QHE77RDYPWTHDFA2","created_at":"2026-07-04T17:12:15Z"},{"alias_kind":"pith_short_8","alias_value":"QHE77RDY","created_at":"2026-07-04T17:12:15Z"}],"graph_snapshots":[{"event_id":"sha256:0ca809a707d67dcf839a01bf999875854bc3811080e3d9fe5c1e1d74b735bfbd","target":"graph","created_at":"2026-07-04T17:12:15Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0808.0841/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A surface magnetoelectric effect is revealed by density-functional calculations that are applied to ferromagnetic Fe(001), Ni(001) and Co(0001) films in the presence of external electric field. The effect originates from spin-dependent screening of the electric field which leads to notable changes in the surface magnetization and the surface magnetocrystalline anisotropy. These results are of considerable interest in the area of electrically-controlled magnetism and magnetoelectric phenomena.","authors_text":"Chun-Gang Duan, E. Y. Tsymbal, Julian P. Velev, Junhao Chu, R. F. Sabirianov, S. S. Jaswal, Ziqiang Zhu","cross_cats":["cond-mat.dis-nn"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-08-06T14:07:33Z","title":"Surface Magnetoelectric Effect in Ferromagnetic Metal Films"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.0841","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:c978903e84e1789413ddc55f790097ecf4e868ed7571bc6adb3369932204f213","target":"record","created_at":"2026-07-04T17:12:15Z","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":"187007b6ce57185693515c28bb9199066100acaa4e843cfd9178f3c469fd73ec","cross_cats_sorted":["cond-mat.dis-nn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-08-06T14:07:33Z","title_canon_sha256":"223d933d4329bc61e4709d9abd580d8031155609382dc30b1aa16f46c466181a"},"schema_version":"1.0","source":{"id":"0808.0841","kind":"arxiv","version":1}},"canonical_sha256":"81c9ffc4787da671941a46d9418ca1ae890df13dbcfc87295060fdd205ff63ff","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"81c9ffc4787da671941a46d9418ca1ae890df13dbcfc87295060fdd205ff63ff","first_computed_at":"2026-07-04T17:12:15.694014Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:12:15.694014Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qGKmSkZ9e6nzzdLPXRFfN1kiVmoa38xNBcFvzL5Ii5sp5Bto6sjFZqZCjJIyziq+I+Vgug05f9BbEY62nR9MAw==","signature_status":"signed_v1","signed_at":"2026-07-04T17:12:15.694365Z","signed_message":"canonical_sha256_bytes"},"source_id":"0808.0841","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c978903e84e1789413ddc55f790097ecf4e868ed7571bc6adb3369932204f213","sha256:0ca809a707d67dcf839a01bf999875854bc3811080e3d9fe5c1e1d74b735bfbd"],"state_sha256":"888ab5f12f67088c84bf21b8bd461b2e8559a0dfa57c22a2a511a64d87a1f8c8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5OfzIEWzMg1X5/rJJdClyJQxsCF3fi2R7QmsoQtQSo2EdZkI4HamHXXxDGWmWWItBVPwz9a51u+Nm76zZcIUBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T05:45:29.921880Z","bundle_sha256":"b9e6c43b85f9d43520e2a11b5220cc3a9c783fe7b2f15a44b7534401e65900c7"}}