{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:EZJHSZ2UXRTSJ5PHW5JVW5IJEW","short_pith_number":"pith:EZJHSZ2U","canonical_record":{"source":{"id":"1401.1527","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2014-01-07T22:19:11Z","cross_cats_sorted":[],"title_canon_sha256":"a5da7fe6a4381b5d8972eb716b6fa8bc2eb93497d4a504735f4b9feb8dd65489","abstract_canon_sha256":"002e0458654d95d0b1bf39359fbc03ea85581e2faeecf74f839e6b6a9892a35b"},"schema_version":"1.0"},"canonical_sha256":"2652796754bc6724f5e7b7535b750925a21e5ea0b1ef061b72f72974d0ce24f9","source":{"kind":"arxiv","id":"1401.1527","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.1527","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"arxiv_version","alias_value":"1401.1527v1","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.1527","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"pith_short_12","alias_value":"EZJHSZ2UXRTS","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"EZJHSZ2UXRTSJ5PH","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"EZJHSZ2U","created_at":"2026-05-18T12:28:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:EZJHSZ2UXRTSJ5PHW5JVW5IJEW","target":"record","payload":{"canonical_record":{"source":{"id":"1401.1527","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2014-01-07T22:19:11Z","cross_cats_sorted":[],"title_canon_sha256":"a5da7fe6a4381b5d8972eb716b6fa8bc2eb93497d4a504735f4b9feb8dd65489","abstract_canon_sha256":"002e0458654d95d0b1bf39359fbc03ea85581e2faeecf74f839e6b6a9892a35b"},"schema_version":"1.0"},"canonical_sha256":"2652796754bc6724f5e7b7535b750925a21e5ea0b1ef061b72f72974d0ce24f9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:58:23.140919Z","signature_b64":"ttHQVtOnCGe2BQPxVH2YbzaX8DZIyBDqVb+nLmvI48NwXdqhXqR9JmS3Nbra3KO5mv7hiaGxZrqi0HThVEpOBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2652796754bc6724f5e7b7535b750925a21e5ea0b1ef061b72f72974d0ce24f9","last_reissued_at":"2026-05-18T02:58:23.140444Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:58:23.140444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1401.1527","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:58:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pi6Z5bDjMQcnasnsyHK8wLsFypRR8xKmvstEI1sKRLbXl0U8B86byLYOn72M5qhTA3PX1wGSdJwwFEwZ55VLCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:16:35.032587Z"},"content_sha256":"7f6160f594898b9f479a92604f337270531e898854ed30d3217531fff33d2540","schema_version":"1.0","event_id":"sha256:7f6160f594898b9f479a92604f337270531e898854ed30d3217531fff33d2540"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:EZJHSZ2UXRTSJ5PHW5JVW5IJEW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"What is the minimal model of magnetic interactions in Fe-based superconductors?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"I. I. Mazin, J. K. Glasbrenner, J. P. Velev","submitted_at":"2014-01-07T22:19:11Z","abstract_excerpt":"Using noncollinear first-principles calculations we perform a systematic study of the magnetic order in several families of ferropnictides. We find a fairly universal energy dependence on the magnetization order in all cases. Our results confirm that a simple Heisenberg model fails to account for the energy dependence of the magnetization in couple of ways: first a biquadratic term is present in all cases and second the magnetic moment softens depending on the orientation. We also find that hole doping substantially reduces the biquadratic contribution, although the antiferromagnetic stripe st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.1527","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:58:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lYJsEkK10j1dqxvr1s23+W8GrILaq37VZ9yxNg+drb99tW93GTKrfVyO+6gp20pIG5mv0qYIUIVfwJ1m6yK0CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:16:35.032931Z"},"content_sha256":"2f84631bffca2c7fd20ddd8f4163731de63fedf2c90c21d80ad186f92040ef7d","schema_version":"1.0","event_id":"sha256:2f84631bffca2c7fd20ddd8f4163731de63fedf2c90c21d80ad186f92040ef7d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EZJHSZ2UXRTSJ5PHW5JVW5IJEW/bundle.json","state_url":"https://pith.science/pith/EZJHSZ2UXRTSJ5PHW5JVW5IJEW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EZJHSZ2UXRTSJ5PHW5JVW5IJEW/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T14:16:35Z","links":{"resolver":"https://pith.science/pith/EZJHSZ2UXRTSJ5PHW5JVW5IJEW","bundle":"https://pith.science/pith/EZJHSZ2UXRTSJ5PHW5JVW5IJEW/bundle.json","state":"https://pith.science/pith/EZJHSZ2UXRTSJ5PHW5JVW5IJEW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EZJHSZ2UXRTSJ5PHW5JVW5IJEW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:EZJHSZ2UXRTSJ5PHW5JVW5IJEW","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":"002e0458654d95d0b1bf39359fbc03ea85581e2faeecf74f839e6b6a9892a35b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2014-01-07T22:19:11Z","title_canon_sha256":"a5da7fe6a4381b5d8972eb716b6fa8bc2eb93497d4a504735f4b9feb8dd65489"},"schema_version":"1.0","source":{"id":"1401.1527","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.1527","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"arxiv_version","alias_value":"1401.1527v1","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.1527","created_at":"2026-05-18T02:58:23Z"},{"alias_kind":"pith_short_12","alias_value":"EZJHSZ2UXRTS","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"EZJHSZ2UXRTSJ5PH","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"EZJHSZ2U","created_at":"2026-05-18T12:28:28Z"}],"graph_snapshots":[{"event_id":"sha256:2f84631bffca2c7fd20ddd8f4163731de63fedf2c90c21d80ad186f92040ef7d","target":"graph","created_at":"2026-05-18T02:58:23Z","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":"Using noncollinear first-principles calculations we perform a systematic study of the magnetic order in several families of ferropnictides. We find a fairly universal energy dependence on the magnetization order in all cases. Our results confirm that a simple Heisenberg model fails to account for the energy dependence of the magnetization in couple of ways: first a biquadratic term is present in all cases and second the magnetic moment softens depending on the orientation. We also find that hole doping substantially reduces the biquadratic contribution, although the antiferromagnetic stripe st","authors_text":"I. I. Mazin, J. K. Glasbrenner, J. P. Velev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2014-01-07T22:19:11Z","title":"What is the minimal model of magnetic interactions in Fe-based superconductors?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.1527","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":"sha256:7f6160f594898b9f479a92604f337270531e898854ed30d3217531fff33d2540","target":"record","created_at":"2026-05-18T02:58:23Z","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":"002e0458654d95d0b1bf39359fbc03ea85581e2faeecf74f839e6b6a9892a35b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2014-01-07T22:19:11Z","title_canon_sha256":"a5da7fe6a4381b5d8972eb716b6fa8bc2eb93497d4a504735f4b9feb8dd65489"},"schema_version":"1.0","source":{"id":"1401.1527","kind":"arxiv","version":1}},"canonical_sha256":"2652796754bc6724f5e7b7535b750925a21e5ea0b1ef061b72f72974d0ce24f9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2652796754bc6724f5e7b7535b750925a21e5ea0b1ef061b72f72974d0ce24f9","first_computed_at":"2026-05-18T02:58:23.140444Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:58:23.140444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ttHQVtOnCGe2BQPxVH2YbzaX8DZIyBDqVb+nLmvI48NwXdqhXqR9JmS3Nbra3KO5mv7hiaGxZrqi0HThVEpOBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:58:23.140919Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.1527","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7f6160f594898b9f479a92604f337270531e898854ed30d3217531fff33d2540","sha256:2f84631bffca2c7fd20ddd8f4163731de63fedf2c90c21d80ad186f92040ef7d"],"state_sha256":"99ae73cbf1a12edb74fe4115526dbc1c38fd956b918944ea7b9af5eac8d8edca"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OBTzDxjQx++NIvFEKTPRjzAlfN2Ad+yEpYyy0aQCE0fTgrBXlWZITwvTYaQm5rKy1jkZhZV56tqis5/Xow9uCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T14:16:35.034870Z","bundle_sha256":"d80d894ca09180a023d1b97b348a0407e4f2a5ffbad351cdbb8a9540c31d1041"}}