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

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 scattering effects on exciton dephasing rates neflintw-r6mpw 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 than in other atomic monolayer semiconductors such as transition metal dichalchogenides.Furthermore, EID is click here 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.

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