{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ZQHE4XZQQIERIV62MCNPJBHTAK","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":"2b1f755df5c8bd751127bd7f51d2b260aeebf1356bbaaaf7a4f2c211d9372c4a","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-10-03T16:21:07Z","title_canon_sha256":"82dab09b47eb4eb6ba3e0b90a1abcff7e316c299d06371cd4644e2612395a957"},"schema_version":"1.0","source":{"id":"1910.01574","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1910.01574","created_at":"2026-07-05T00:39:58Z"},{"alias_kind":"arxiv_version","alias_value":"1910.01574v1","created_at":"2026-07-05T00:39:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.01574","created_at":"2026-07-05T00:39:58Z"},{"alias_kind":"pith_short_12","alias_value":"ZQHE4XZQQIER","created_at":"2026-07-05T00:39:58Z"},{"alias_kind":"pith_short_16","alias_value":"ZQHE4XZQQIERIV62","created_at":"2026-07-05T00:39:58Z"},{"alias_kind":"pith_short_8","alias_value":"ZQHE4XZQ","created_at":"2026-07-05T00:39:58Z"}],"graph_snapshots":[{"event_id":"sha256:b789d0ae1f6b14bdccee0e07fe3013d04167633c076fd8ac8031362fba1c05fe","target":"graph","created_at":"2026-07-05T00:39:58Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1910.01574/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We calculate Heisenberg-type magnetic exchange interactions for SrMnO$_3$ under isotropic volume expansion using an approach that is based on total energy variations due to infinitesimal spin rotations around a given reference state. Our total energy calculations using density functional theory (DFT) indicate a transition from antiferromagnetic to ferromagnetic coupling for increasing interatomic distances, corresponding to a sign change of the nearest neighbor exchange interaction. This sign change cannot easily be understood from a standard superexchange mechanism. Furthermore, the exchange ","authors_text":"Alexander Edstr\\\"om, Claude Ederer, Xiangzhou Zhu","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-10-03T16:21:07Z","title":"Magnetic exchange interactions in SrMnO$_3$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.01574","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":"sha256:01e39760860d6243017a5629bbf68520db298cc8e75dcf125a3b08897438ca94","target":"record","created_at":"2026-07-05T00:39:58Z","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":"2b1f755df5c8bd751127bd7f51d2b260aeebf1356bbaaaf7a4f2c211d9372c4a","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-10-03T16:21:07Z","title_canon_sha256":"82dab09b47eb4eb6ba3e0b90a1abcff7e316c299d06371cd4644e2612395a957"},"schema_version":"1.0","source":{"id":"1910.01574","kind":"arxiv","version":1}},"canonical_sha256":"cc0e4e5f3082091457da609af484f3028a502331bbd4a9962adf2012d35875f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cc0e4e5f3082091457da609af484f3028a502331bbd4a9962adf2012d35875f5","first_computed_at":"2026-07-05T00:39:58.285310Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:39:58.285310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GpIHP39JWv0FGPwM/Occ5bOtkuZvSeooctV9hQTqXA0NK5EKjWZhdEV5bMTIaWHUZIHIMnYl8jx3UdoNLPRYAg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:39:58.285828Z","signed_message":"canonical_sha256_bytes"},"source_id":"1910.01574","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01e39760860d6243017a5629bbf68520db298cc8e75dcf125a3b08897438ca94","sha256:b789d0ae1f6b14bdccee0e07fe3013d04167633c076fd8ac8031362fba1c05fe"],"state_sha256":"a89b6a15101c18465cd4b7912218e7223f4abae496624fb5083d09c1325e66ff"}