{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:C4LBJY3FNMBLDT6H6RQBPY2SNW","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":"d612db7fc69f9410555dabafc19e8920a7dbde825436157addb4d3c9c3721280","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2026-05-12T20:19:35Z","title_canon_sha256":"8717e2bad5eb559450b15f2e9f15becc466e6fecf469d8edab15a432b9cdc8cd"},"schema_version":"1.0","source":{"id":"2605.12711","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.12711","created_at":"2026-05-18T03:09:49Z"},{"alias_kind":"arxiv_version","alias_value":"2605.12711v1","created_at":"2026-05-18T03:09:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.12711","created_at":"2026-05-18T03:09:49Z"},{"alias_kind":"pith_short_12","alias_value":"C4LBJY3FNMBL","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_16","alias_value":"C4LBJY3FNMBLDT6H","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_8","alias_value":"C4LBJY3F","created_at":"2026-05-18T12:33:37Z"}],"graph_snapshots":[{"event_id":"sha256:d227b12b8432a9fea519767ee19f6cae46fef50ff457a789a27e79c2206d25f0","target":"graph","created_at":"2026-05-18T03:09:49Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"We predict that a large low-bias negative differential resistance can be observed in an altermagnetic tunnel junction... supports a large tunneling magnetoresistance with sign inversion at 0.13 V."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"The quasi-2D Fermi surface of KV2Se2O plays a crucial role in realizing the negative differential resistance, and the DFT+NEGF model accurately captures the bias-dependent transport without significant errors from functional choice or interface details."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"Altermagnetic tunnel junctions based on KV2Se2O exhibit low-bias negative differential resistance and sign-inverting ultra-high TMR due to the material's quasi-2D Fermi surface."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"Altermagnetic tunnel junctions with KV2Se2O produce large low-bias negative differential resistance and sign-inverting TMR."}],"snapshot_sha256":"7c282f02784f83ace06f47433dbe7eda6c003a714d4fe4fa1348d3f3cbb78500"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Altermagnets can replace ferromagnets in tunnel junctions, yielding large tunneling magnetoresistance, ultrafast switching, and low-power functionality. While most studies explore the linear-response regime, interesting features emerge at finite bias, where the peculiar electronic structure of altermagnets gives rise to complex non-linear behaviour. Using non-equilibrium Green's functions implemented with density functional theory, we predict that a large low-bias negative differential resistance can be observed in an altermagnetic tunnel junction. Our proposed junction incorporates the orbita","authors_text":"Declan Nell, Luke Keenan, Sajjan Sheoran, Stefano Sanvito","cross_cats":["cond-mat.mtrl-sci"],"headline":"Altermagnetic tunnel junctions with KV2Se2O produce large low-bias negative differential resistance and sign-inverting TMR.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2026-05-12T20:19:35Z","title":"Negative Differential Resistance and Ultra-High TMR in Altermagnetic Tunnel Junctions"},"references":{"count":14,"internal_anchors":0,"resolved_work":14,"sample":[{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":1,"title":"(1) Šmejkal, L.; Sinova, J.; Jungwirth, T.Phys. Rev. X2022,12, 031042. (2) Yuan, L.-D.; Wang, Z.; Luo, J.-W.; Zunger, A.Phys. Rev. Mater.2021,5, 014409. (3) Hayami, S.; Yanagi, Y.; Kusunose, H.Phys. R","work_id":"c95faf01-1367-41df-8002-dd82ccf8ab7e","year":2021},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":2,"title":"(5) Sheoran, S.; Dev, P.Phys. Rev. B2025,111, 184407. (6) González-Hernández, R.; Šmejkal, L.; V` yborn` y, K.; Yahagi, Y.; Sinova, J.; Jungwirth, T.; Železn` y, J. Phys. Rev. Lett.2021,126, 127701. (","work_id":"66353d75-369d-4c81-b734-fcd5bde15c6a","year":2021},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":3,"title":"(11) Zhang, X.-P.; Feng, W.; Zhang, R.-W.; Fan, X.; Wang, X.; Yao, Y.Phys. Rev. Lett.2025,135, 266706. (12) Xu, S.; Zhang, Z.; Mahfouzi, F.; Huang, Y.; Cheng, H.; Dai, B.; Kim, J.; Zhu, D.; Cai, W.; S","work_id":"a9dd5512-31a1-4579-ad3b-f140f587fc69","year":2025},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":4,"title":"(13) Noh, S.; Kim, G.-H.; Lee, J.; Jung, H.; Seo, U.; So, G.; Lee, J.; Lee, S.; Park, M.; Yang, S., et al.Phys. Rev. Lett.2025,134, 246703. (14) Halder, A.; Nell, D.; Sihi, A.; Bajaj, A.; Sanvito, S.;","work_id":"4091ede6-8fc7-4f09-a547-d9b94f4b7323","year":2025},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":5,"title":"M.; Archer, T.; Rungger, I.; Sanvito, S.Phys","work_id":"8245daae-9293-4fb5-94ed-0baa771a2d57","year":2012}],"snapshot_sha256":"b870d4bbf2f22dc505a28ca223f4742837251ff2bab61989fbdea82938d15b74"},"source":{"id":"2605.12711","kind":"arxiv","version":1},"verdict":{"created_at":"2026-05-14T19:55:36.620014Z","id":"a4503a3b-4c13-4758-aaf1-2dccabd82b51","model_set":{"reader":"grok-4.3"},"one_line_summary":"Altermagnetic tunnel junctions based on KV2Se2O exhibit low-bias negative differential resistance and sign-inverting ultra-high TMR due to the material's quasi-2D Fermi surface.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Altermagnetic tunnel junctions with KV2Se2O produce large low-bias negative differential resistance and sign-inverting TMR.","strongest_claim":"We predict that a large low-bias negative differential resistance can be observed in an altermagnetic tunnel junction... supports a large tunneling magnetoresistance with sign inversion at 0.13 V.","weakest_assumption":"The quasi-2D Fermi surface of KV2Se2O plays a crucial role in realizing the negative differential resistance, and the DFT+NEGF model accurately captures the bias-dependent transport without significant errors from functional choice or interface details."}},"verdict_id":"a4503a3b-4c13-4758-aaf1-2dccabd82b51"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:5531fc9769e5fa579c04392e1f60ea252c5412511692ace8d78f659080407b1e","target":"record","created_at":"2026-05-18T03:09:49Z","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":"d612db7fc69f9410555dabafc19e8920a7dbde825436157addb4d3c9c3721280","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2026-05-12T20:19:35Z","title_canon_sha256":"8717e2bad5eb559450b15f2e9f15becc466e6fecf469d8edab15a432b9cdc8cd"},"schema_version":"1.0","source":{"id":"2605.12711","kind":"arxiv","version":1}},"canonical_sha256":"171614e3656b02b1cfc7f46017e3526daccbfd935c777df8c41e0e7c4a43188e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"171614e3656b02b1cfc7f46017e3526daccbfd935c777df8c41e0e7c4a43188e","first_computed_at":"2026-05-18T03:09:49.539617Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:09:49.539617Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"g57/biUdMjPWMOyqLlFCPm1vRKLjKAqC/OqP82yD2VGT3+wGse63cXxAsSAYbx+MxEitNCrqVGEXOaCOZ4jMAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:09:49.540538Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.12711","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5531fc9769e5fa579c04392e1f60ea252c5412511692ace8d78f659080407b1e","sha256:d227b12b8432a9fea519767ee19f6cae46fef50ff457a789a27e79c2206d25f0"],"state_sha256":"8f4854ce70877d49278f60d1372ccf411b99117e927df87b15c3942feb92fb0d"}