{"paper":{"title":"Layer-dependent Land\\'e $g$-factors of electrons, holes, and excitons in two-dimensional Ruddlesden-Popper lead halide perovskites","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"Electron and hole g-factors in two-dimensional Ruddlesden-Popper perovskites vary systematically with the number of inorganic layers and break the universal bulk pattern.","cross_cats":[],"primary_cat":"cond-mat.other","authors_text":"Carolin Harkort, Dennis Kudlacik, Dmitri R. Yakovlev, Erik Kirstein, Evgeny A. Zhukov, Maksym V. Kovalenko, Manfred Bayer, Mikhail O. Nestoklon, Nataliia E. Kopteva, Ole F. Dressler, Oleh Hordiichuk, Scott A. Crooker","submitted_at":"2026-05-15T10:01:59Z","abstract_excerpt":"Two-dimensional Ruddlesden-Popper lead halide perovskites provide a valuable platform for tailoring charge and spin properties through quantum confinement and reduced symmetry. While the electron and hole Land\\'e $g$-factors in bulk lead halide perovskites exhibit a universal dependence on the band gap energy, their evolution in two-dimensional perovskites has remained largely unexplored. Here, the Zeeman splittings of electrons and holes in (PEA)$_2$MA$_{n-1}$Pb$_n$I$_{3n+1}$ perovskites with the number of inorganic layers ovarying in the range $n=1,...,8$ are measured by means of the spin-fl"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"A systematic evolution of the electron and hole g-factors with decreasing layer thickness, which deviates from the universal bulk behavior and reveals confinement-driven trends similar to those observed in perovskite nanocrystals.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the observed Zeeman splittings in spin-flip Raman scattering and Kerr rotation can be cleanly assigned to electron and hole contributions without significant mixing from exciton or phonon effects or from the specific choice of excitation energy (section on experimental methods implied in abstract).","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Layer-dependent g-factors of electrons, holes, and excitons in (PEA)2MA(n-1)Pb(n)I(3n+1) perovskites deviate from bulk universal trends and match empirical tight-binding calculations.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Electron and hole g-factors in two-dimensional Ruddlesden-Popper perovskites vary systematically with the number of inorganic layers and break the universal bulk pattern.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"8584664ffb10cf55187c373cfbfb1f419984795e679869e3f9c2eaec7bf0f684"},"source":{"id":"2605.15807","kind":"arxiv","version":1},"verdict":{"id":"ce2b4e4b-679a-43b7-9400-61d8480ad004","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T17:52:37.981118Z","strongest_claim":"A systematic evolution of the electron and hole g-factors with decreasing layer thickness, which deviates from the universal bulk behavior and reveals confinement-driven trends similar to those observed in perovskite nanocrystals.","one_line_summary":"Layer-dependent g-factors of electrons, holes, and excitons in (PEA)2MA(n-1)Pb(n)I(3n+1) perovskites deviate from bulk universal trends and match empirical tight-binding calculations.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the observed Zeeman splittings in spin-flip Raman scattering and Kerr rotation can be cleanly assigned to electron and hole contributions without significant mixing from exciton or phonon effects or from the specific choice of excitation energy (section on experimental methods implied in abstract).","pith_extraction_headline":"Electron and hole g-factors in two-dimensional Ruddlesden-Popper perovskites vary systematically with the number of inorganic layers and break the universal bulk pattern."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.15807/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_compliance","ran_at":"2026-05-19T18:01:22.799540Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_title_agreement","ran_at":"2026-05-19T18:01:18.594968Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T17:33:48.734535Z","status":"skipped","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T17:21:55.892741Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"d17bfa60acb27c639c10ff9b2678a99dbc5a958ce016fd00991758c77fcd9783"},"references":{"count":45,"sample":[{"doi":"","year":2019,"title":"Mao, L.; Stoumpos, C. C.; Kanatzidis, M. G. Two- dimensional hybrid halide perovskites: principles and promises.J. Am. Chem. Soc.2019,141, 1171","work_id":"df98a380-8090-46c6-a691-b18e19c2e879","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2020,"title":"Blancon, J.-C.; Even, J.; Stoumpos, C. C.; Kanatzidis, M. G.; Mohite, A. D. Semiconductor physics of organic- inorganic 2D halide perovskites.Nat. Nanotechnol.2020, 15, 969. [3]Hybrid Organic Inorgani","work_id":"c3dd2730-168b-42e8-a1d0-206dd4d1e7d7","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2024,"title":"Blue light-emitting diodes based on pure bromide perovskites,Adv","work_id":"a78781ee-ba16-4ff7-91ce-39c18f42611f","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2020,"title":"K.; Agarwal, P.; Sum, T","work_id":"125d0cc2-fd3f-4e2f-adee-570fd4d5a9cc","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2024,"title":"Kopteva, N. E.; Yakovlev, D. R.; Yalcin, E.; Akimov, I. A.; Nestoklon, M. O.; Glazov, M. M.; Kotur, M.; Kudlacik, D.; Zhukov, E. A.; Kirstein, E.; Hordiichuk, O.; Dirin, D. N.; Kovalenko, M. V.; Bayer","work_id":"0abdef15-6b3b-4b0f-8c17-2e9d853bb7b2","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":45,"snapshot_sha256":"f8545ce2a0e1bfb001e239f2c9fe1f9ade2b5f9a59082ca8c40f69e7136ef56a","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"0971a499bc3c6d08a0720c9fbae16aece1b7e146f2e2cd14762ee8b6d3fff8c3"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}