{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:D2MAZKQXL37HA7IPMLC6LDVHSB","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":"816f413be24000ea0bcc8971885f81365ca7016853b920a2800107cd4c162b4a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-07-29T18:32:11Z","title_canon_sha256":"07037c9513a9324c0cc53bbe117ce334eb611dc1a5076da1a251e6e095b476e6"},"schema_version":"1.0","source":{"id":"1407.7813","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.7813","created_at":"2026-05-18T01:37:49Z"},{"alias_kind":"arxiv_version","alias_value":"1407.7813v2","created_at":"2026-05-18T01:37:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.7813","created_at":"2026-05-18T01:37:49Z"},{"alias_kind":"pith_short_12","alias_value":"D2MAZKQXL37H","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"D2MAZKQXL37HA7IP","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"D2MAZKQX","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:24814e0ca4b8106475a2f2a881bd04c8e010a0e731ab3dcc76b01f16d60c176a","target":"graph","created_at":"2026-05-18T01:37:49Z","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 structural and magnetic properties of the spin-$\\frac12$ quantum antiferromagnet Cu[C$_6$H$_2$(COO)$_4$][C$_2$H$_5$NH$_3$]$_2$ by means of single-crystal x-ray diffraction, magnetization, heat capacity, and electron spin resonance (ESR) measurements on polycrystalline samples, as well as band-structure calculations. The triclinic crystal structure of this compound features CuO$_4$ plaquette units connected into a two-dimensional framework through anions of the pyromellitic acid [C$_6$H$_2$(COO)$_4$]$^{4-}$. The ethylamine cations [C$_2$H$_5$NH$_3]^+$ are located between the layers an","authors_text":"A. A. Tsirlin, A. Thirumurugan, D. Ehlers, H.-A. Krug von Nidda, M. Hemmida, M. Padmanabhan, R. Nath, S. Baby","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-07-29T18:32:11Z","title":"Quasi-two-dimensional $S=1/2$ magnetism of Cu[C$_6$H$_2$(COO)$_4$][C$_2$H$_5$NH$_3$]$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.7813","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":"sha256:2e9e35917f83c7b71e2797bef2ab2a08f77b97e53ac637bc53a4b495bd2615b4","target":"record","created_at":"2026-05-18T01:37:49Z","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":"816f413be24000ea0bcc8971885f81365ca7016853b920a2800107cd4c162b4a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-07-29T18:32:11Z","title_canon_sha256":"07037c9513a9324c0cc53bbe117ce334eb611dc1a5076da1a251e6e095b476e6"},"schema_version":"1.0","source":{"id":"1407.7813","kind":"arxiv","version":2}},"canonical_sha256":"1e980caa175efe707d0f62c5e58ea790408e8955e87b81bd7e27287ad3804cd4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1e980caa175efe707d0f62c5e58ea790408e8955e87b81bd7e27287ad3804cd4","first_computed_at":"2026-05-18T01:37:49.413657Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:49.413657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/pTxDUkMj8y1Fi/Lk7ngRtJHY7N+DOpRRumI0q6QTEPl6rIoRZJee6ihpzmkxBtWLGiD2Hs7xnZn7bxPddaGAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:49.414256Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.7813","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2e9e35917f83c7b71e2797bef2ab2a08f77b97e53ac637bc53a4b495bd2615b4","sha256:24814e0ca4b8106475a2f2a881bd04c8e010a0e731ab3dcc76b01f16d60c176a"],"state_sha256":"b932cf2f061752e44faf742cd111e42d1097ef9fe27a2c481f9b8ca2927052ab"}