Figure 1
From: Layer-dependent semiconductor-metal transition of SnO/Si(001) heterostructure and device application
(a) The top view of SnO unitcell and two-dimensional Brillouin zone with selected high symmetry points. (b) 3D view of SnO layer over clean Si(001)-1 × 1 surface with the 1st and 2nd Si layers shown in green and blue respectively and the rest Si layers in yellow. (c) and (d) Schematics of most stable SnO/Si(001) structure viewed along x:[110] direction and y:[1–10] direction respectively. It is noted that the interfacial structure viewed along x is different from y due to the two-fold rotational symmetry of Si(001) surface.
