Enhanced screening and spectral diversity in many-body elastic scattering of excitons in two-dimensional hybrid metal-halide perovskites

Enhanced screening and spectral diversity in many-body elastic scattering of excitons in two-dimensional hybrid metal-halide perovskites

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We quantify the role of many-body elastic radio birdman tshirt scattering effects on exciton dephasing rates in two-dimensional hybrid metal-halide perovskites by means of nonlinear coherent excitation spectroscopy at a temperature of 5 K.We find that the exciton-density dependence of excitation-induced dephasing (EID) is two to three orders of magnitude lower turbo air m3f24-1-n than in other atomic monolayer semiconductors such as transition metal dichalchogenides.Furthermore, EID is different for the multiple excitons evident in the excitation line shape, as is their phonon-mediated temperature dependence.We ascribe these observations to screening effects due to polaronic dressing by the lattice.