Fig. 5. EK edge at a 1|2-layer boundary in AB-stacked hBN.
(A) HR-TEM image of monolayer and bilayer hBN with an AB stacking structure. The white arrow points to the 1|2-layer boundary. Scale bar, 1 nm. (B) Experimental images from the blue-boxed area (1|2-layer boundary) and green-boxed area (a triangular defect) inside (A), as well as the corresponding simulation image and atomic model. (C to E) Formation mechanism of a twin boundary from observations of an EK edge. Boron and nitrogen atoms are represented in pink and blue, respectively. Also see movie S2.