Figure 5
From: Atomic-scale study of the amorphous-to-crystalline phase transition mechanism in GeTe thin films

Local structure around FeGe in a 2 × 2 × 2 supercell of GeTe in (a) the rhombohedral structure of c-GeTe and in (b) a-GeTe, where local configuration around FeGe is assumed tetrahedral. Red spheres indicate the Fe impurity substituting Ge (purple spheres) in the two configurations, where grey spheres represent the Te atoms.