{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:6RQZFHRKK35FFK7JDC5GEMMODS","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":"4eca29681448481bfa5df48052bdf30c9f4d165f3766a343ef47c7cd17709205","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-05-22T14:52:13Z","title_canon_sha256":"851f951015b0bc0f0ad90477d102b7b715c6e99d63aee8bef82b8be2f44cda47"},"schema_version":"1.0","source":{"id":"1305.5157","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.5157","created_at":"2026-05-18T03:25:05Z"},{"alias_kind":"arxiv_version","alias_value":"1305.5157v2","created_at":"2026-05-18T03:25:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.5157","created_at":"2026-05-18T03:25:05Z"},{"alias_kind":"pith_short_12","alias_value":"6RQZFHRKK35F","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"6RQZFHRKK35FFK7J","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"6RQZFHRK","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:0348903f605082c176abaa27a441f8f54198c048ee6a7427ea7e2e09e06a0249","target":"graph","created_at":"2026-05-18T03:25:05Z","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 effects of doping on formation energy and concentration of oxygen vacancies at a metal oxide surface, using MgO (100) as an example. Our approach employs density-functional theory, where the performance of the exchange-correlation functional is carefully analyzed, and the functional is chosen according to a fundamental condition on DFT ionization energies. The approach is further validated by CCSD(T) calculations for embedded clusters. We demonstrate that the concentration of oxygen vacancies at a doped oxide surface is largely determined by formation of a macroscopically extend","authors_text":"(2) Humboldt Universit\\\"at zu Berlin), Joachim Sauer (2), Matthias Scheffler (1) ((1) Fritz-Haber-Institut der Max-Planck-Gesellschaft, Norina A. Richter (1), Sabrina Sicolo (2), Sergey V. Levchenko (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-05-22T14:52:13Z","title":"Concentration of Vacancies at Metal Oxide Surfaces: Case Study of MgO (100)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.5157","kind":"arxiv","version":2},"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:dddd1f29956ca4e241408bbbe8d59338b0534e209b9270e9fa2013ac4d4be4fa","target":"record","created_at":"2026-05-18T03:25:05Z","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":"4eca29681448481bfa5df48052bdf30c9f4d165f3766a343ef47c7cd17709205","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-05-22T14:52:13Z","title_canon_sha256":"851f951015b0bc0f0ad90477d102b7b715c6e99d63aee8bef82b8be2f44cda47"},"schema_version":"1.0","source":{"id":"1305.5157","kind":"arxiv","version":2}},"canonical_sha256":"f461929e2a56fa52abe918ba62318e1c8f682ae29916a80f0ba886c3811b0f67","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f461929e2a56fa52abe918ba62318e1c8f682ae29916a80f0ba886c3811b0f67","first_computed_at":"2026-05-18T03:25:05.314464Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:25:05.314464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IPY1PFaorHBt/gePAefgQh9G5b19cXHAGLtJvaS4cDVJV2vRDePSvqdEX5OGz8+Fv9xrlPfcWnAajswwZPfLDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:25:05.315003Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.5157","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dddd1f29956ca4e241408bbbe8d59338b0534e209b9270e9fa2013ac4d4be4fa","sha256:0348903f605082c176abaa27a441f8f54198c048ee6a7427ea7e2e09e06a0249"],"state_sha256":"48d38d04e062abdda32913beca36b048c17f5055c7c29d2f091f1233e5a4e2c4"}