{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:SE435GWSXVR7QX5OQJIUN5EYIA","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":"e319a0023a03444c04ad322bd6c7b9f82070ac4d45b871a290dbdfb20dbfbd23","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-10-12T21:54:53Z","title_canon_sha256":"22c4308c7b892c01cc63c1440003c830785e238332c36c2642e12e3bd7b11ce4"},"schema_version":"1.0","source":{"id":"0910.2258","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.2258","created_at":"2026-05-18T04:38:17Z"},{"alias_kind":"arxiv_version","alias_value":"0910.2258v1","created_at":"2026-05-18T04:38:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.2258","created_at":"2026-05-18T04:38:17Z"},{"alias_kind":"pith_short_12","alias_value":"SE435GWSXVR7","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"SE435GWSXVR7QX5O","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"SE435GWS","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:fae0861e42b803ac0905efd00e97396779b518f3090eaf225b531d0100c8535a","target":"graph","created_at":"2026-05-18T04:38:17Z","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":"Crystal structure and magnetic properties of the layered vanadium phosphate PbZnVO(PO4)2 are studied using x-ray powder diffraction, magnetization and specific heat measurements, as well as band structure calculations. The compound resembles AA'VO(PO4)2 vanadium phosphates and fits to the extended frustrated square lattice model with the couplings J(1), J(1)' between nearest-neighbors and J(2), J(2)' between next-nearest-neighbors. The temperature dependence of the magnetization yields estimates of averaged nearest-neighbor and next-nearest-neighbor couplings, J(1) ~ -5.2 K and J(2) ~ 10.0 K, ","authors_text":"Alexander A. Tsirlin, Artem M. Abakumov, Christoph Geibel, Helge Rosner, Ramesh Nath, Roman V. Shpanchenko","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-10-12T21:54:53Z","title":"Frustrated square lattice with spatial anisotropy: crystal structure and magnetic properties of PbZnVO(PO4)2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.2258","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:fd77eb8f556f13f7a5c341484b08ff70c389a8893e8a8c298fd0830203dedc10","target":"record","created_at":"2026-05-18T04:38:17Z","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":"e319a0023a03444c04ad322bd6c7b9f82070ac4d45b871a290dbdfb20dbfbd23","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-10-12T21:54:53Z","title_canon_sha256":"22c4308c7b892c01cc63c1440003c830785e238332c36c2642e12e3bd7b11ce4"},"schema_version":"1.0","source":{"id":"0910.2258","kind":"arxiv","version":1}},"canonical_sha256":"9139be9ad2bd63f85fae825146f4984034478e800e20249db12eb6c81c070da8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9139be9ad2bd63f85fae825146f4984034478e800e20249db12eb6c81c070da8","first_computed_at":"2026-05-18T04:38:17.337235Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:38:17.337235Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TzpdNpMcASIy8TegRDEKuDhBQDtIobZC0YAWzEUbqmlvZXt9xfVvgErJiReDArYZ+oj5blQlRNQ9ngYjUcETAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:38:17.337954Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.2258","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd77eb8f556f13f7a5c341484b08ff70c389a8893e8a8c298fd0830203dedc10","sha256:fae0861e42b803ac0905efd00e97396779b518f3090eaf225b531d0100c8535a"],"state_sha256":"334aa7525f0d9e63ee0ae1d75bbe952e3b20c45163ea8772ac85cbde77c7307c"}