{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:VMV6ZU2CQEEVJHTJ3U2ARZLHUV","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":"a996ac2742ca5234fbd602fd5daeb08897ab5eacee34e7c42bdad25956ef8704","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2009-11-17T01:06:01Z","title_canon_sha256":"c1e1059802066bd18f4e57936d4c819f35a2c3e76d6e1f12aa8a1b095a59987c"},"schema_version":"1.0","source":{"id":"0911.3185","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.3185","created_at":"2026-05-18T00:32:55Z"},{"alias_kind":"arxiv_version","alias_value":"0911.3185v1","created_at":"2026-05-18T00:32:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.3185","created_at":"2026-05-18T00:32:55Z"},{"alias_kind":"pith_short_12","alias_value":"VMV6ZU2CQEEV","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"VMV6ZU2CQEEVJHTJ","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"VMV6ZU2C","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:e292807ad6595e565e96193e2d668e16b857568a373a500717d57f517d114efa","target":"graph","created_at":"2026-05-18T00:32:55Z","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":"The post-perovskite phase of (Mg,Fe)SiO3 is believed to be the main mineral phase of the Earth's lowermost mantle (the D\" layer). Its properties explain numerous geophysical observations associated with this layer - for example, the D'' discontinuity, its topography and seismic anisotropy within the layer. Here we use a novel simulation technique, first-principles metadynamics, to identify a family of low-energy polytypic stacking-fault structures intermediate between the perovskite and post-perovskite phases. Metadynamics trajectories identify plane sliding involving the formation of stacking","authors_text":"A. Laio, A.R. Oganov, M Parrinello, P. Raiteri, R. Martonak","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2009-11-17T01:06:01Z","title":"Anisotropy of Earth's D\" layer and stacking faults in the MgSiO3 post-perovskite phase"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.3185","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:e25726a0910c212b5c644fd2c70b93717ea53e6d0f2db899c646071508b3418e","target":"record","created_at":"2026-05-18T00:32:55Z","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":"a996ac2742ca5234fbd602fd5daeb08897ab5eacee34e7c42bdad25956ef8704","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2009-11-17T01:06:01Z","title_canon_sha256":"c1e1059802066bd18f4e57936d4c819f35a2c3e76d6e1f12aa8a1b095a59987c"},"schema_version":"1.0","source":{"id":"0911.3185","kind":"arxiv","version":1}},"canonical_sha256":"ab2becd3428109549e69dd3408e567a54b3146b4cc4f357f3cad09f0a27e2f2b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ab2becd3428109549e69dd3408e567a54b3146b4cc4f357f3cad09f0a27e2f2b","first_computed_at":"2026-05-18T00:32:55.878929Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:55.878929Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gvekq/WkIts9VH41nl5Re78beRYr2pp/ERIyK+jXsmjFDzvYsNjPfvAOHLGMXj5Ua6g/XNIeRn/d1mUqXj+JDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:55.879663Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.3185","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e25726a0910c212b5c644fd2c70b93717ea53e6d0f2db899c646071508b3418e","sha256:e292807ad6595e565e96193e2d668e16b857568a373a500717d57f517d114efa"],"state_sha256":"bf8c3b3c53fb8269c1511dc9c658624c4837fcd51999d82ad440950db5910f3d"}