{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:ESGAMM7SRSRCHHCMIN3MPLEOWF","short_pith_number":"pith:ESGAMM7S","canonical_record":{"source":{"id":"2501.01162","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-01-02T09:32:29Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"7c03d9c237edff6a1ca4e379916d981a60f37ba1ef062fcf7f7fc177e8263693","abstract_canon_sha256":"79afb3784b87210052407669ab840e7fa3d318f32096e8f971c6c4d0bbe9c77e"},"schema_version":"1.0"},"canonical_sha256":"248c0633f28ca2239c4c4376c7ac8eb14e2af93ee6a9126f9f432075569b8c56","source":{"kind":"arxiv","id":"2501.01162","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.01162","created_at":"2026-07-05T09:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"2501.01162v1","created_at":"2026-07-05T09:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.01162","created_at":"2026-07-05T09:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"ESGAMM7SRSRC","created_at":"2026-07-05T09:56:15Z"},{"alias_kind":"pith_short_16","alias_value":"ESGAMM7SRSRCHHCM","created_at":"2026-07-05T09:56:15Z"},{"alias_kind":"pith_short_8","alias_value":"ESGAMM7S","created_at":"2026-07-05T09:56:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:ESGAMM7SRSRCHHCMIN3MPLEOWF","target":"record","payload":{"canonical_record":{"source":{"id":"2501.01162","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-01-02T09:32:29Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"7c03d9c237edff6a1ca4e379916d981a60f37ba1ef062fcf7f7fc177e8263693","abstract_canon_sha256":"79afb3784b87210052407669ab840e7fa3d318f32096e8f971c6c4d0bbe9c77e"},"schema_version":"1.0"},"canonical_sha256":"248c0633f28ca2239c4c4376c7ac8eb14e2af93ee6a9126f9f432075569b8c56","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:56:15.708466Z","signature_b64":"g+rbgOgeztLZEBIkT6o/0VNySZOpuJ5HDTa+zSwzowAtvlbkkAMFNjCpaknzX9fKwV7C5uu504UkRKshCQQkBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"248c0633f28ca2239c4c4376c7ac8eb14e2af93ee6a9126f9f432075569b8c56","last_reissued_at":"2026-07-05T09:56:15.708017Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:56:15.708017Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.01162","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":"2026-07-05T09:56:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J+TptCCKVTV+DVd3qdmruO0LXMYK/tIQnE6UhOlOgfIjvlYnJ8Ken4gwhM2fMyKsrnWGhnCrIY/OaxmdfJTWAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T18:52:15.230104Z"},"content_sha256":"bf91912fe2adaa5df01f24dfe093f0edad7a12700cbf39e92c7e33ea917f3ff6","schema_version":"1.0","event_id":"sha256:bf91912fe2adaa5df01f24dfe093f0edad7a12700cbf39e92c7e33ea917f3ff6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:ESGAMM7SRSRCHHCMIN3MPLEOWF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Atomic-scale observation of $d$-$\\pi$-$d$ spin coupling in coordination structures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Bingwu Wang, Gui-Lin Zhu, Haoyang Pan, Ivano E. Castelli, Jie Li, Jing-Tao L\\\"u, Kai Wu, Lianmao Peng, Minghui Yu, Per Hedeg\\r{a}rd, Shang-Da Jiang, Shimin Hou, Song Gao, Xin Li, Xue Zhang, Yajie Zhang, Yaping Zang, Yongfeng Wang, Zhen Xu, Ziyong Shen","submitted_at":"2025-01-02T09:32:29Z","abstract_excerpt":"Spin coupling between magnetic metal atoms and organic radicals plays a pivotal role in high-performance magnetic materials. The complex interaction involving multi-spin centers in bulk materials makes it challenging to study spin coupling at the atomic scale. Here, we investigate the $d$-$\\pi$-$d$ spin interaction in well-defined metal-organic coordinated structures composed of two iron (Fe) atoms and four all-trans retinoic acid (ReA) molecules, using low-temperature scanning tunneling microscopy and atomic force microscopy. The ReA molecule is turned into a spin-$1/2$ radical state by dehyd"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.01162","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2501.01162/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T09:56:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FN+lxOZUzmqe00+Pbwf5FQEtXvuXcGy0VLBspXg3PFGhl1OzwAyZcn4dxjCPcj6mc05lhXYIDaPJ0+Yws2ZMDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T18:52:15.230725Z"},"content_sha256":"af6f2bc27d1bdec936fb7c178c39f920f9ad48e3db61f90da68a065dd75ad42b","schema_version":"1.0","event_id":"sha256:af6f2bc27d1bdec936fb7c178c39f920f9ad48e3db61f90da68a065dd75ad42b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ESGAMM7SRSRCHHCMIN3MPLEOWF/bundle.json","state_url":"https://pith.science/pith/ESGAMM7SRSRCHHCMIN3MPLEOWF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ESGAMM7SRSRCHHCMIN3MPLEOWF/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":"2026-08-23T18:52:15Z","links":{"resolver":"https://pith.science/pith/ESGAMM7SRSRCHHCMIN3MPLEOWF","bundle":"https://pith.science/pith/ESGAMM7SRSRCHHCMIN3MPLEOWF/bundle.json","state":"https://pith.science/pith/ESGAMM7SRSRCHHCMIN3MPLEOWF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ESGAMM7SRSRCHHCMIN3MPLEOWF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:ESGAMM7SRSRCHHCMIN3MPLEOWF","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":"79afb3784b87210052407669ab840e7fa3d318f32096e8f971c6c4d0bbe9c77e","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-01-02T09:32:29Z","title_canon_sha256":"7c03d9c237edff6a1ca4e379916d981a60f37ba1ef062fcf7f7fc177e8263693"},"schema_version":"1.0","source":{"id":"2501.01162","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.01162","created_at":"2026-07-05T09:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"2501.01162v1","created_at":"2026-07-05T09:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.01162","created_at":"2026-07-05T09:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"ESGAMM7SRSRC","created_at":"2026-07-05T09:56:15Z"},{"alias_kind":"pith_short_16","alias_value":"ESGAMM7SRSRCHHCM","created_at":"2026-07-05T09:56:15Z"},{"alias_kind":"pith_short_8","alias_value":"ESGAMM7S","created_at":"2026-07-05T09:56:15Z"}],"graph_snapshots":[{"event_id":"sha256:af6f2bc27d1bdec936fb7c178c39f920f9ad48e3db61f90da68a065dd75ad42b","target":"graph","created_at":"2026-07-05T09:56:15Z","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/2501.01162/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Spin coupling between magnetic metal atoms and organic radicals plays a pivotal role in high-performance magnetic materials. The complex interaction involving multi-spin centers in bulk materials makes it challenging to study spin coupling at the atomic scale. Here, we investigate the $d$-$\\pi$-$d$ spin interaction in well-defined metal-organic coordinated structures composed of two iron (Fe) atoms and four all-trans retinoic acid (ReA) molecules, using low-temperature scanning tunneling microscopy and atomic force microscopy. The ReA molecule is turned into a spin-$1/2$ radical state by dehyd","authors_text":"Bingwu Wang, Gui-Lin Zhu, Haoyang Pan, Ivano E. Castelli, Jie Li, Jing-Tao L\\\"u, Kai Wu, Lianmao Peng, Minghui Yu, Per Hedeg\\r{a}rd, Shang-Da Jiang, Shimin Hou, Song Gao, Xin Li, Xue Zhang, Yajie Zhang, Yaping Zang, Yongfeng Wang, Zhen Xu, Ziyong Shen","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-01-02T09:32:29Z","title":"Atomic-scale observation of $d$-$\\pi$-$d$ spin coupling in coordination structures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.01162","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:bf91912fe2adaa5df01f24dfe093f0edad7a12700cbf39e92c7e33ea917f3ff6","target":"record","created_at":"2026-07-05T09:56:15Z","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":"79afb3784b87210052407669ab840e7fa3d318f32096e8f971c6c4d0bbe9c77e","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-01-02T09:32:29Z","title_canon_sha256":"7c03d9c237edff6a1ca4e379916d981a60f37ba1ef062fcf7f7fc177e8263693"},"schema_version":"1.0","source":{"id":"2501.01162","kind":"arxiv","version":1}},"canonical_sha256":"248c0633f28ca2239c4c4376c7ac8eb14e2af93ee6a9126f9f432075569b8c56","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"248c0633f28ca2239c4c4376c7ac8eb14e2af93ee6a9126f9f432075569b8c56","first_computed_at":"2026-07-05T09:56:15.708017Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:56:15.708017Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"g+rbgOgeztLZEBIkT6o/0VNySZOpuJ5HDTa+zSwzowAtvlbkkAMFNjCpaknzX9fKwV7C5uu504UkRKshCQQkBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T09:56:15.708466Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.01162","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf91912fe2adaa5df01f24dfe093f0edad7a12700cbf39e92c7e33ea917f3ff6","sha256:af6f2bc27d1bdec936fb7c178c39f920f9ad48e3db61f90da68a065dd75ad42b"],"state_sha256":"bd1ed1b5507ac71202ae3558839d123b3a3be264f934c4967ab71d8e3b55b52b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mYebZUNBQU6kZTuGmaQOh6QOzbN9QDsOirn7MAZ4BVGTOowxkyYy2WGiQ3hmRomBhMszBWu1s8vf8HFHFcmFDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T18:52:15.234803Z","bundle_sha256":"a2654cc695c9b998460408dd69f0a2a10e7de7fc2f98bfe6be2a2c4c7f89a897"}}