Weak dispersion of exciton Landé factor with band gap energy in lead halide perovskites

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dc.contributor.authorKopteva, Natalia E.
dc.contributor.authorYakovlev, Dmitri R.
dc.contributor.authorKirstein, Erik
dc.contributor.authorZhukov, Evgeny A.
dc.contributor.authorKudlacik, Dennis
dc.contributor.authorKalitukha, Ina V.
dc.contributor.authorSapega, Victor F.
dc.contributor.authorHordiichuk, Oleh
dc.contributor.authorDirin, Dmitry N.
dc.contributor.authorKovalenko, Makysm V.
dc.contributor.authorBaumann, Andreas
dc.contributor.authorHöcker, Julian
dc.contributor.authorDyakonov, Vladimir
dc.contributor.authorCrooker, Scott A.
dc.contributor.authorBayer, Manfred
dc.date.accessioned2025-03-31T13:32:49Z
dc.date.available2025-03-31T13:32:49Z
dc.date.issued2023-11-27
dc.description.abstractThe optical properties of lead halide perovskite semiconductors in vicinity of the bandgap are controlled by excitons, so that investigation of their fundamental properties is of critical importance. The exciton Landé or g-factor gX is the key parameter, determining the exciton Zeeman spin splitting in magnetic fields. The exciton, electron, and hole carrier g-factors provide information on the band structure, including its anisotropy, and the parameters contributing to the electron and hole effective masses. Here, gX is measured by reflectivity in magnetic fields up to 60 T for lead halide perovskite crystals. The materials band gap energies at a liquid helium temperature vary widely across the visible spectral range from 1.520 up to 3.213 eV in hybrid organic–inorganic and fully inorganic perovskites with different cations and halogens: FA0.9Cs0.1PbI2.8Br0.2, MAPbI3, FAPbBr3, CsPbBr3, and MAPb(Br0.05Cl0.95)3. The exciton g-factors are found to be nearly constant, ranging from +2.3 to +2.7. Thus, the strong dependences of the electron and hole g-factors on the bandgap roughly compensate each other when combining to the exciton g-factor. The same is true for the anisotropies of the carrier g-factors, resulting in a nearly isotropic exciton g-factor. The experimental data are compared favorably with model calculation results.en
dc.identifier.urihttp://hdl.handle.net/2003/43580
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-25413
dc.language.isoen
dc.relation.ispartofseriesSmall; 20(16)
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/
dc.subjectelectron g-factoren
dc.subjectexciton Landé factoren
dc.subjecthole g-factoren
dc.subjectlead halide perovskitesen
dc.subjectmagneto-reflectivityen
dc.subjectpump-probe Kerr ellipticityen
dc.subjectspin-flip Raman scatteringen
dc.subject.ddc530
dc.titleWeak dispersion of exciton Landé factor with band gap energy in lead halide perovskitesen
dc.title.alternativeapproximate compensation of the electron and hole dependencesen
dc.typeText
dc.type.publicationtypeResearchArticle
dcterms.accessRightsopen access
eldorado.secondarypublicationtrue
eldorado.secondarypublication.primarycitationN. E. Kopteva, D. R. Yakovlev, E. Kirstein, E. A. Zhukov, D. Kudlacik, I. V. Kalitukha, V. F. Sapega, O. Hordiichuk, D. N. Dirin, M. V. Kovalenko, A. Baumann, J. Höcker, V. Dyakonov, S. A. Crooker, M. Bayer, Weak Dispersion of Exciton Landé Factor with Band Gap Energy in Lead Halide Perovskites: Approximate Compensation of the Electron and Hole Dependences. Small 2024, 20, 2300935. https://doi.org/10.1002/smll.202300935
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1002/smll.202300935

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