fig8
Figure 8. (A) HfO2-ZrO2 fluorite-structure system. (B) Schematic of the HZH fluorite-structure multilayer. (C) High-resolution TEM images of HZH tri-layer (top) and extracted d-lattice spacings[79]. Reprinted from Ref.[79], with permission from Springer Nature. The superlattice structures of (D) sample C1, (E) sample C2, (F) sample C4, (G) sample C5[80]. Reprinted from Ref.[80], with permission from Wiley.