Phonon coherences reveal the polaronic character of excitons in two-dimensional lead halide perovskites

Phonon coherences reveal the polaronic character of excitons in two-dimensional lead halide perovskites

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High-resolution resonant impulsive stimulated Raman spectroscopy in two-dimensional hybrid metal halide perovskites provides evidence for polaronic effects on excitons, which couple to distinct low-frequency vibrational modes of the ionic lattice.

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