{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:CLOMK5BB6WU5HZGZQQCBJ2LXNI","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":"2a744022e0a81f8d6f53f154329d60d90db214184743af6d55c9351f65af0f0a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-16T09:12:14Z","title_canon_sha256":"ee47ea94e8358a2a2250558bb6cb1d7b8615c6c68448582280433c52d242a3f1"},"schema_version":"1.0","source":{"id":"1611.05189","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.05189","created_at":"2026-05-18T00:50:51Z"},{"alias_kind":"arxiv_version","alias_value":"1611.05189v1","created_at":"2026-05-18T00:50:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.05189","created_at":"2026-05-18T00:50:51Z"},{"alias_kind":"pith_short_12","alias_value":"CLOMK5BB6WU5","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"CLOMK5BB6WU5HZGZ","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"CLOMK5BB","created_at":"2026-05-18T12:30:09Z"}],"graph_snapshots":[{"event_id":"sha256:b7400f9d14a09e981d6b2b5317d1bbaef1a7aa843b3dd04be95eac8c2f2f1a75","target":"graph","created_at":"2026-05-18T00:50:51Z","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 report static and dynamic first-principles calculations that provide atomistic pictures of the initial stage of the oxidation processes occurring at the ($11\\bar20$) surface of 4H-SiC. Our results unveil reaction pathways and their associated free-energy barriers for the adsorption of oxygen and the desorption of carbon atoms. We find that oxygen adsorption shows structural multi-stability and that the surface-bridge sites are the most stable and crucial sites for subsequent oxidation. We find that an approaching O$_2$ molecule is adsorbed, then dissociated and finally migrates toward these","authors_text":"Atsushi Oshiyama, Han Li, Mauro Boero, Yu-ichiro Matsushita","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-16T09:12:14Z","title":"First-principles calculations that clarify energetics and reactions of oxygen adsorption and carbon desorption on 4H-SiC ($11\\bar20$) surface"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.05189","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:a5a969a01d35f08e0d1dc8b122ba295097ea3df613c834b45e8928bb9a72a6fa","target":"record","created_at":"2026-05-18T00:50:51Z","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":"2a744022e0a81f8d6f53f154329d60d90db214184743af6d55c9351f65af0f0a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-16T09:12:14Z","title_canon_sha256":"ee47ea94e8358a2a2250558bb6cb1d7b8615c6c68448582280433c52d242a3f1"},"schema_version":"1.0","source":{"id":"1611.05189","kind":"arxiv","version":1}},"canonical_sha256":"12dcc57421f5a9d3e4d9840414e9776a0d6da88431267a11d92611c84fdef1e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"12dcc57421f5a9d3e4d9840414e9776a0d6da88431267a11d92611c84fdef1e9","first_computed_at":"2026-05-18T00:50:51.893197Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:51.893197Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mHgwsyWpxWLTfqPK381m485keV1R9sT0Dq3tojSVuSXCgiTRg+2nxfYroZL1IECwYO1yQalWDUh8rU8JtsW9AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:51.893703Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.05189","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a5a969a01d35f08e0d1dc8b122ba295097ea3df613c834b45e8928bb9a72a6fa","sha256:b7400f9d14a09e981d6b2b5317d1bbaef1a7aa843b3dd04be95eac8c2f2f1a75"],"state_sha256":"bac793ed41da14f8e02224ddad3d5a34f8dc4736b1c6ca0d231ccb73400c5f00"}