{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:IK6S6M7M3G42NU2S44UGGZC7D7","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":"904ea21e447a255849497bbef10b1c7ab197b00628abe61ad565d8069a3fd36f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-09-05T11:03:38Z","title_canon_sha256":"abaf4dea9aaf451cc685daffd20c4f1808fbe3d5c0a2d42cb4882f6bfeb024f7"},"schema_version":"1.0","source":{"id":"2409.03415","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2409.03415","created_at":"2026-07-05T09:57:46Z"},{"alias_kind":"arxiv_version","alias_value":"2409.03415v1","created_at":"2026-07-05T09:57:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2409.03415","created_at":"2026-07-05T09:57:46Z"},{"alias_kind":"pith_short_12","alias_value":"IK6S6M7M3G42","created_at":"2026-07-05T09:57:46Z"},{"alias_kind":"pith_short_16","alias_value":"IK6S6M7M3G42NU2S","created_at":"2026-07-05T09:57:46Z"},{"alias_kind":"pith_short_8","alias_value":"IK6S6M7M","created_at":"2026-07-05T09:57:46Z"}],"graph_snapshots":[{"event_id":"sha256:69f5b5e5a9adb4264ddccc8d63097670901eefa1d8a91c7b0952912e509024ac","target":"graph","created_at":"2026-07-05T09:57:46Z","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/2409.03415/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The spin filtering effect, distinct decaying lengths experienced by oppositely spin-polarized electrons in a magnetic barrier, generally occurs in ferromagnetic (FM) insulators or semiconductors. With the rise of altermagnetic (ALM) materials which exhibit similar capability of spin-polarizing electrons with ferromagnets, it is a nature question whether the ALM insulators or semiconductors can also act as unique barriers for the spin splitting effect. Here, through first-principles calculations, we investigated the complex band structure of the ALM insulator FeF$_2$ and found that it possesses","authors_text":"Boyuan Chi, Caihua Wan, Guoqiang Yu, Leina Jiang, Xiufeng Han, Yu Zhu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-09-05T11:03:38Z","title":"Anisotropic spin filtering by an altermagnetic barrier in magnetic tunnel junctions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2409.03415","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":"sha256:180cc84568599d2c66865b004dd6e9fec801c88956e932ae13542fe06605ea28","target":"record","created_at":"2026-07-05T09:57:46Z","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":"904ea21e447a255849497bbef10b1c7ab197b00628abe61ad565d8069a3fd36f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-09-05T11:03:38Z","title_canon_sha256":"abaf4dea9aaf451cc685daffd20c4f1808fbe3d5c0a2d42cb4882f6bfeb024f7"},"schema_version":"1.0","source":{"id":"2409.03415","kind":"arxiv","version":1}},"canonical_sha256":"42bd2f33ecd9b9a6d352e72863645f1ff698de5cb490c53173de220bf705fd2c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42bd2f33ecd9b9a6d352e72863645f1ff698de5cb490c53173de220bf705fd2c","first_computed_at":"2026-07-05T09:57:46.321742Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:57:46.321742Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qPofHWAGmCBLvVxv13HbP7kFA5xwoRBw3ryBm2gCDyAZCiY76qSY7V+RYdpw+V6K8xBZaJzkEr1e63IdRol+DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T09:57:46.322265Z","signed_message":"canonical_sha256_bytes"},"source_id":"2409.03415","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:180cc84568599d2c66865b004dd6e9fec801c88956e932ae13542fe06605ea28","sha256:69f5b5e5a9adb4264ddccc8d63097670901eefa1d8a91c7b0952912e509024ac"],"state_sha256":"7a72e5796a2143fa8c943db32d64584523abef674a2c1ae4116b42a8945a8c7e"}