{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:DKITPYNTSZ6K55Y2FNQ77VSPTZ","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":"fb6c770b96b85f347c1788c6593388ff89e3fd09d0ad5b01b175349c30048507","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-03-17T14:43:44Z","title_canon_sha256":"96974070cc4e450a9d2163c02cfd0e01c8f90f7aa5c8b99b7bd1deb413f4b0ac"},"schema_version":"1.0","source":{"id":"1303.4063","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.4063","created_at":"2026-05-18T03:19:34Z"},{"alias_kind":"arxiv_version","alias_value":"1303.4063v1","created_at":"2026-05-18T03:19:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.4063","created_at":"2026-05-18T03:19:34Z"},{"alias_kind":"pith_short_12","alias_value":"DKITPYNTSZ6K","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DKITPYNTSZ6K55Y2","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DKITPYNT","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:a3e7c4060e34091b212ea2252e0f3210f576bb91eca44e0194a5ab32d463c6d8","target":"graph","created_at":"2026-05-18T03:19:34Z","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":"Periodic and cluster density-functional theory (DFT) calculations, including DFT+U and hybrid functionals, are applied to study magnetostructural correlations in spin-1/2 frustrated chain compounds CuX2: CuCl2, CuBr2, and a fictitious chain structure of CuF2. The nearest-neighbor and second-neighbor exchange integrals, J1 and J2, are evaluated as a function of the Cu-X-Cu bridging angle, theta, in the physically relevant range 80-110deg. In the ionic CuF2, J1 is ferromagnetic for theta smaller 100deg. For larger angles, the antiferromagnetic superexchange contribution becomes dominant, in acco","authors_text":"A. A. Tsirlin, H. Rosner, M. Schmitt, O. Janson, S. Lebernegg","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-03-17T14:43:44Z","title":"Magnetism of CuX2 frustrated chains (X = F, Cl, Br): the role of covalency"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.4063","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:e8d4f53f7486b3fcfe4d1f70e22c90a2afd1b8a1720f86ac2af9905e2e261a79","target":"record","created_at":"2026-05-18T03:19:34Z","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":"fb6c770b96b85f347c1788c6593388ff89e3fd09d0ad5b01b175349c30048507","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-03-17T14:43:44Z","title_canon_sha256":"96974070cc4e450a9d2163c02cfd0e01c8f90f7aa5c8b99b7bd1deb413f4b0ac"},"schema_version":"1.0","source":{"id":"1303.4063","kind":"arxiv","version":1}},"canonical_sha256":"1a9137e1b3967caef71a2b61ffd64f9e725842824af8d800c5700caed54a6132","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a9137e1b3967caef71a2b61ffd64f9e725842824af8d800c5700caed54a6132","first_computed_at":"2026-05-18T03:19:34.838348Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:19:34.838348Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qXKIEb+9/lbj9hJzcM0mm4ZcYFuawLKRSH6U+hzjwxSqZ0qO5/4CNmYxixjI5Vd5zbT7S04LMKWBLMpFry2dCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:19:34.838840Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.4063","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e8d4f53f7486b3fcfe4d1f70e22c90a2afd1b8a1720f86ac2af9905e2e261a79","sha256:a3e7c4060e34091b212ea2252e0f3210f576bb91eca44e0194a5ab32d463c6d8"],"state_sha256":"356e23c2831bb659c1e281fcac86ff64da783498645371d194d03cbda4271606"}