Manganese doping for enhanced magnetic brightening and circular polarization control of dark excitons in paramagnetic layered hybrid metal-halide perovskites

• DOI: 10.1038/s41467-021-23602-1
• Publication Date: 2021-06-09T10:16:45Z
• Authors: Timo Neumann; Sascha Feldmann; Philipp Moser; Alex Delhomme; Jonathan Zerhoch; Tim van de Goor; Shuli Wang; Mateusz Dyksik; Thomas Winkler; Jonathan J. Finley; Paulina Plochocka; Martin S. Brandt; Clément Faugeras; Andreas V. Stier; Felix Deschler
• Keywords: Spin states

Abstract Materials combining semiconductor functionalities with spin control are desired for the advancement of quantum technologies. Here, we study magneto-optical properties novel paramagnetic Ruddlesden-Popper hybrid perovskites Mn:(PEA) 2 PbI 4 (PEA = phenethylammonium) and report magnetically brightened excitonic luminescence strong circular polarization from interaction isolated Mn 2+ ions. Using a combination superconducting interference device (SQUID) magnetometry, magneto-absorption transient optical spectroscopy, find that dark exciton population is by state mixing bright excitons in presence magnetic field. Unexpectedly, follows Brillouin-shaped magnetization saturation 13% at K 6 T. From high-field magneto-luminescence attribute our observations to spin-dependent dynamics early times after excitation, first indications Mn-mediated spin-flip process. Our findings demonstrate manganese doping as powerful approach physics perovskites, which will stimulate research on this highly tuneable material platform promise tailored interactions between moments states.