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- W3169713060 abstract "Materials combining semiconductor functionalities with spin control are desired for the advancement of quantum technologies. Here, we study the magneto-optical properties of novel paramagnetic Ruddlesden-Popper hybrid perovskites Mn:(PEA)2PbI4 (PEA = phenethylammonium) and report magnetically brightened excitonic luminescence with strong circular polarization from the interaction with isolated Mn2+ ions. Using a combination of superconducting quantum interference device (SQUID) magnetometry, magneto-absorption and transient optical spectroscopy, we find that a dark exciton population is brightened by state mixing with the bright excitons in the presence of a magnetic field. Unexpectedly, the circular polarization of the dark exciton luminescence follows the Brillouin-shaped magnetization with a saturation polarization of 13% at 4 K and 6 T. From high-field transient magneto-luminescence we attribute our observations to spin-dependent exciton dynamics at early times after excitation, with first indications for a Mn-mediated spin-flip process. Our findings demonstrate manganese doping as a powerful approach to control excitonic spin physics in Ruddlesden-Popper perovskites, which will stimulate research on this highly tuneable material platform with promise for tailored interactions between magnetic moments and excitonic states." @default.
- W3169713060 created "2021-06-22" @default.
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- W3169713060 date "2021-06-09" @default.
- W3169713060 modified "2023-10-10" @default.
- W3169713060 title "Manganese doping for enhanced magnetic brightening and circular polarization control of dark excitons in paramagnetic layered hybrid metal-halide perovskites" @default.
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- W3169713060 doi "https://doi.org/10.1038/s41467-021-23602-1" @default.
- W3169713060 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8190121" @default.
- W3169713060 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34108469" @default.
- W3169713060 hasPublicationYear "2021" @default.
- W3169713060 type Work @default.