{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1996:73HFUMTG66GXQ4AGFNXPSUQ5MA","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":"5805ed2f9252a953eb8b659e5fbed5e5bd7af617d5c2e596051c61a158e6501d","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"","primary_cat":"mtrl-th","submitted_at":"1996-09-26T11:14:50Z","title_canon_sha256":"2124a923f63e6793a92610e8bdba4a9690f7f436863d8e853c06090077ba8a3a"},"schema_version":"1.0","source":{"id":"mtrl-th/9609011","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"mtrl-th/9609011","created_at":"2026-05-18T01:05:22Z"},{"alias_kind":"arxiv_version","alias_value":"mtrl-th/9609011v1","created_at":"2026-05-18T01:05:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.mtrl-th/9609011","created_at":"2026-05-18T01:05:22Z"},{"alias_kind":"pith_short_12","alias_value":"73HFUMTG66GX","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"73HFUMTG66GXQ4AG","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"73HFUMTG","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:e4429a9557e279cfe015bf4dedf1a38cd35669792d317e14426cf7821ef72c10","target":"graph","created_at":"2026-05-18T01:05:22Z","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 develop a model to study the thermal expansion of surfaces, wherein phonon frequencies are obtained from ab initio total energy calculations. Anharmonic effects are treated exactly in the direction normal to the surface, and within a quasiharmonic approximation in the plane of the surface. We apply this model to the Ag(111) and Al(111) surfaces, and find that our calculations reproduce the experimental observation of a large and anomalous increase in the surface thermal expansion of Ag(111) at high temperatures [P. Statiris, H.C. Lu and T. Gustafsson, Phys. Rev. Lett. 72, 3574 (1994)]. Surp","authors_text":"Matthias Scheffler, Shobhana Narasimhan","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"","primary_cat":"mtrl-th","submitted_at":"1996-09-26T11:14:50Z","title":"A Model for the Thermal Expansion of Ag(111) and other Metal Surfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"mtrl-th/9609011","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:d23ce383179aebd0df3deb8c5688c422412a0ba52b59e40a4e7082527ad5ca78","target":"record","created_at":"2026-05-18T01:05:22Z","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":"5805ed2f9252a953eb8b659e5fbed5e5bd7af617d5c2e596051c61a158e6501d","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"","primary_cat":"mtrl-th","submitted_at":"1996-09-26T11:14:50Z","title_canon_sha256":"2124a923f63e6793a92610e8bdba4a9690f7f436863d8e853c06090077ba8a3a"},"schema_version":"1.0","source":{"id":"mtrl-th/9609011","kind":"arxiv","version":1}},"canonical_sha256":"fece5a3266f78d7870062b6ef9521d6013c0bae16b3518158b9a240bfa64ff2c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fece5a3266f78d7870062b6ef9521d6013c0bae16b3518158b9a240bfa64ff2c","first_computed_at":"2026-05-18T01:05:22.290574Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:05:22.290574Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RNIVuguT9TT24zgLZ/qeCBA+BtaDGuJStraVt6WbaeE0KTyQ9fAQ5/tD+aeeNpjg02BGyoab1qFligijWxwhAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:05:22.291047Z","signed_message":"canonical_sha256_bytes"},"source_id":"mtrl-th/9609011","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d23ce383179aebd0df3deb8c5688c422412a0ba52b59e40a4e7082527ad5ca78","sha256:e4429a9557e279cfe015bf4dedf1a38cd35669792d317e14426cf7821ef72c10"],"state_sha256":"b81f613cb8c8288da678d7f63b0812e4c0960b8551ec583124b7732223869321"}