{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ET5XQBXGMKB6MBFZAZLKHQCQJT","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":"0a6fb4a4544be482e754a7610535ee8756ada0cd0ced91d41f29d5ebe45f8b8e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-04-13T08:34:38Z","title_canon_sha256":"8ff6c91ce728cccc1d8c121bff54e682fb1de8468c20117f0164b3605c498dc3"},"schema_version":"1.0","source":{"id":"1804.04836","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.04836","created_at":"2026-05-18T00:18:34Z"},{"alias_kind":"arxiv_version","alias_value":"1804.04836v1","created_at":"2026-05-18T00:18:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.04836","created_at":"2026-05-18T00:18:34Z"},{"alias_kind":"pith_short_12","alias_value":"ET5XQBXGMKB6","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"ET5XQBXGMKB6MBFZ","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"ET5XQBXG","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:9bf68948c47c908e942b514a5819962cfd9776564c4d6ae0e9c231dccb4c211e","target":"graph","created_at":"2026-05-18T00:18:34Z","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":"Iron oxides play an increasingly prominent role in heterogeneous catalysis, hydrogen production, spintronics and drug delivery. The surface or material interface can be performance limiting in these applications, so it is vital to determine accurate atomic-scale structures for iron oxides and understand why they form. Using a combination of quantitative low-energy electron diffraction, scanning tunneling microscopy, and density functional theory calculations, we show that an ordered array of subsurface iron vacancies and interstitials underlies the well-known (rt2xrt2)R45{\\deg} reconstruction ","authors_text":"E. McDermott, G.S. Parkinson, J. Pavelec, L. Hammer, M. A. Schneider, M. Schmid, M. Setvin, O. Gamba, P. Blaha, P. Ferstl, R. Bliem, U. Diebold","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-04-13T08:34:38Z","title":"Subsurface Cation Vacancy Stabilization of the Magnetite (001) Surface"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04836","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":"sha256:97a4bf56f04a9221d3eaa5d59f7c4247dc4efed6e5b406b41543d23e9f21d29d","target":"record","created_at":"2026-05-18T00:18:34Z","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":"0a6fb4a4544be482e754a7610535ee8756ada0cd0ced91d41f29d5ebe45f8b8e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-04-13T08:34:38Z","title_canon_sha256":"8ff6c91ce728cccc1d8c121bff54e682fb1de8468c20117f0164b3605c498dc3"},"schema_version":"1.0","source":{"id":"1804.04836","kind":"arxiv","version":1}},"canonical_sha256":"24fb7806e66283e604b90656a3c0504ce3967ebd58752476f45baf8fec6f292c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24fb7806e66283e604b90656a3c0504ce3967ebd58752476f45baf8fec6f292c","first_computed_at":"2026-05-18T00:18:34.819740Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:34.819740Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yKYgEY8LAoAlAbeq/pHPo/DSbNUFxKYeF2sqPm70bLadI3C5UGlawhl998VAYUdkYsxz36PcYk+Dpzys5AWpBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:34.820221Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.04836","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:97a4bf56f04a9221d3eaa5d59f7c4247dc4efed6e5b406b41543d23e9f21d29d","sha256:9bf68948c47c908e942b514a5819962cfd9776564c4d6ae0e9c231dccb4c211e"],"state_sha256":"09415b0c0f033961c2427e62a2f79cef685c107b1fd495fb824e6fe9b39d2b6d"}