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Resonant cooling of nuclear spins by optically-oriented holes in MAPbI perovskite crystals
Mladen Kotur, Dmitri R. Yakovlev, Nataliia E. Kopteva +3
Resonant cooling of nuclear spins by photogenerated spin-oriented holes is demonstrated for MAPbI perovskite crystals. It is evidenced by Hanle-effect measurements under helici…
Optical orientation of excitons and charged carriers in MAPbI perovskite single crystals in the orthorhombic phase
Nataliia E. Kopteva, Dmitri R. Yakovlev, Eyüp Yalcin +6
Optical orientation of exciton and carrier spins by circularly polarized light is the basic phenomenon in the spin physics of semiconductors. Here, we investigate spin orientation…
Spin-dependent exciton-exciton interactions in a mixed lead halide perovskite crystal
Stefan Grisard, Artur V. Trifonov, Thilo Hahn +6
We investigate the two-pulse photon echo response of excitons in the mixed lead halide perovskite crystal \sample in dependence on the excitation intensity and polarization of the…
Dark-Bright Exciton Splitting Dominates Low-Temperature Diffusion in Halide Perovskite Nanocrystal Assemblies
Andreas J. Bornschlegl, Michael F. Lichtenegger, Leo Luber +4
Semiconductor nanocrystals could replace conventional bulk materials completely in displays and light-emitting diodes. Exciton transport dominates over charge carrier transport for…
Exciton-polaritons in CsPbBr crystals revealed by optical reflectivity in high magnetic fields and two-photon spectroscopy
Dmitri R. Yakovlev, Scott A. Crooker, Marina A. Semina +5
Cesium lead bromide (CsPbBr) is a representative material of the emerging class of lead halide perovskite semiconductors that possess remarkable optoelectronic properties. Its…
Giant optical orientation of exciton spins in lead halide perovskite crystals
Natalia E. Kopteva, Dmitri R. Yakovlev, Eyüp Yalcin +11
Optical orientation of carrier spins by circularly polarized light is the basis of spin physics in semiconductors. Here, we demonstrate strong optical orientation of 85\%, approach…