{"paper":{"title":"Strong electron correlations and ligand hybridization for altermagnetism","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Strong local electron correlations and ligand hybridization are required for altermagnetism in correlated materials.","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Anderson Janotti, Byungkyun Kang, Chul Hong Park, Dai Q. Ho, Eunja Kim, Mark R. Pederson, Myoung-Hwan Kim, Sangkook Choi","submitted_at":"2026-05-14T01:31:45Z","abstract_excerpt":"Spin-band splitting is a hallmark of altermagnetism, intrinsically linked to magnetic ordering driven by electron correlations. However, recent inconsistencies in the detection of altermagnetism in strongly correlated altermagnet candidates have cast doubt on the robustness of this phenomenon and its dependence on many-body effects. Here, using state-of-the-art quantum many-body frameworks, we dissect the electronic origins of altermagnetism in three prototypical candidates: MnF$_2$, MnTe, and RuO$_2$. In MnF$_2$, we identify pronounced local electron correlations within Mn-3$d$ states and unc"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Both strong local electron correlations and judicious ligand selection to promote orbital hybridization are key prerequisites to realizing altermagnetism in strongly correlated systems.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The state-of-the-art quantum many-body frameworks used accurately capture nonlocal screening, Mott gaps, and hybridization effects without approximations that would alter the reported trends in spin-band splitting.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Strong correlations suppress spin splitting in MnF2 via band narrowing, enable it in MnTe through Mn 3d-Te 5p hybridization, and produce itinerant splitting without local moments in RuO2.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Strong local electron correlations and ligand hybridization are required for altermagnetism in correlated materials.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"b351266b7a4a4994b50e6ab8bd9c41a44a55e2f593ddde304d7c06d4b646c99d"},"source":{"id":"2605.14248","kind":"arxiv","version":1},"verdict":{"id":"8d762e55-cd19-4b73-adb2-a2502d07c832","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-15T02:34:14.986053Z","strongest_claim":"Both strong local electron correlations and judicious ligand selection to promote orbital hybridization are key prerequisites to realizing altermagnetism in strongly correlated systems.","one_line_summary":"Strong correlations suppress spin splitting in MnF2 via band narrowing, enable it in MnTe through Mn 3d-Te 5p hybridization, and produce itinerant splitting without local moments in RuO2.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The state-of-the-art quantum many-body frameworks used accurately capture nonlocal screening, Mott gaps, and hybridization effects without approximations that would alter the reported trends in spin-band splitting.","pith_extraction_headline":"Strong local electron correlations and ligand hybridization are required for altermagnetism in correlated materials."},"references":{"count":103,"sample":[{"doi":"","year":2022,"title":"L. Smejkal, A. H. MacDonald, J. Sinova, S. Nakatsuji, and T. Jungwirth, Anomalous hall antiferromagnets, Nat. Rev. Mater.7, 482 (2022)","work_id":"84b8385f-36df-44f5-a222-b6009d687198","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2024,"title":"O. Fedchenko, J. Min ´ar, A. Akashdeep, S. W. D’Souza, D. Vasilyev, O. Tkach, L. Odenbreit, Q. Nguyen, D. Kut- nyakhov, N. Wind,et al., Observation of time-reversal sym- metry breaking in the band str","work_id":"d089754f-c487-4729-b8ca-10098038dd4c","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2020,"title":"L. Smejkal, R. Gonzalez-Hernandez, T. Jungwirth, and J. Sinova, Crystal time-reversal symmetry breaking and spon- taneous Hall effect in collinear antiferromagnets, Sci. Adv.6, eaaz8809 (2020)","work_id":"5667d338-7548-48bf-9131-4f51362c3c5c","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2021,"title":"R. Gonzalez-Hernandez, L. Smejkan, K. Vyborny, Y . Yahagi, J. Sinova, T. Jungwirth, and J. Zelezny, Efficient electrical spin splitter based on nonrelativistic collinear antiferromagnetism, Phys. Rev.","work_id":"755b2e15-4928-4df8-a789-b632d0b67c51","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2021,"title":"I. I. Mazin, K. Koepernik, M. D. Johannes, R. Gonzalez- Hernandez, and L. Smejkal, Prediction of unconventional magnetism in doped FeSb 2, Proc. Natl. Acad. Sci.118, e2108924118 (2021)","work_id":"4365a7e7-d338-428c-b079-81531bdc0d7a","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":103,"snapshot_sha256":"6af96fe4169ac94805bf709b63d8af00422e1bc35033446e566e034b374ea1a5","internal_anchors":1},"formal_canon":{"evidence_count":2,"snapshot_sha256":"f825c1992a58f83c98cfca17968f4958c68a336ee00c029f44e55c39b1c84bc2"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}