Spin-flip Raman scattering on electrons and holes in two-dimensional (PEA)2PbI4 perovskites

dc.contributor.authorHarkort, Carolin
dc.contributor.authorKudlacik, Dennis
dc.contributor.authorKopteva, Natalia E.
dc.contributor.authorYakovlev, Dmitri R.
dc.contributor.authorKarzel, Marek
dc.contributor.authorKirstein, Erik
dc.contributor.authorHordiichuk, Oleh
dc.contributor.authorKovalenko, Maksym V.
dc.contributor.authorBayer, Manfred
dc.date.accessioned2025-02-11T14:20:15Z
dc.date.available2025-02-11T14:20:15Z
dc.date.issued2023-04-17
dc.description.abstractThe class of Ruddlesden–Popper type (PEA)2PbI4 perovskites comprises 2D structures whose optical properties are determined by excitons with a large binding energy of about 260 meV. It complements the family of other 2D semiconductor materials by having the band structure typical for lead halide perovskites, that can be considered as inverted compared to conventional III–V and II–VI semiconductors. Accordingly, novel spin phenomena can be expected for them. Spin-flip Raman scattering is used here to measure the Zeeman splitting of electrons and holes in a magnetic field up to 10 T. From the recorded data, the electron and hole Landé factors (g-factors) are evaluated, their signs are determined, and their anisotropies are measured. The electron g-factor value changes from +2.11 out-of-plane to +2.50 in-plane, while the hole g-factor ranges between -0.13 and -0.51. The spin flips of the resident carriers are arranged via their interaction with photogenerated excitons. Also the double spin-flip process, where a resident electron and a resident hole interact with the same exciton, is observed showing a cumulative Raman shift. Dynamic nuclear spin polarization induced by spin-polarized holes is detected in corresponding changes of the hole Zeeman splitting. An Overhauser field of the polarized nuclei acting on the holes as large as 0.6 T can be achieved.en
dc.identifier.urihttp://hdl.handle.net/2003/43458
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-25289
dc.language.isoen
dc.relation.ispartofseriesSmall; 19(32)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject2D perovskitesen
dc.subjectdynamic nuclear polarization, g-factoren
dc.subjecthyperfine interactionen
dc.subjectspin-flip Raman scatteringen
dc.subjectspintronicsen
dc.subject.ddc530
dc.titleSpin-flip Raman scattering on electrons and holes in two-dimensional (PEA)2PbI4 perovskitesen
dc.typeText
dc.type.publicationtypeResearchArticle
dcterms.accessRightsopen access
eldorado.secondarypublicationtrue
eldorado.secondarypublication.primarycitationC. Harkort, D. Kudlacik, N. E. Kopteva, D. R. Yakovlev, M. Karzel, E. Kirstein, O. Hordiichuk, M. V. Kovalenko, M. Bayer, Spin-Flip Raman Scattering on Electrons and Holes in Two-Dimensional (PEA)2PbI4 Perovskites. Small 2023, 19, 2300988. https://doi.org/10.1002/smll.202300988
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1002/smll.202300988

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