Figure 2
From: Oxygen Vacancy Induced Flat Phonon Mode at FeSe /SrTiO3 interface
Illustration of the atomic displacements of the surface polar phonon mode.
(a) Relaxed STOov (001) slab. (b) Relaxed atomic structure of FeSe monolayer on STOov (001) slab. This particular phonon mode is mainly composed of the polar vibrations near STO surface.
