Fig. 3
From: Excited-state vibrational dynamics toward the polaron in methylammonium lead iodide perovskite
DFT calculated vibrational modes of MAPbI3. a Skeletal I–Pb–I bending motion of the PbI64− octahedron at 25.6 cm−1. b I–Pb–I bending motion on the ab-plane at 49.3 cm−1. c Pb–I c-axis stretching motion at 82.0 cm−1. Red arrows on the atoms indicate the direction and relative amplitude of displacements in the given vibrational modes
