Figure 2
From: Tunable one-dimensional electron gas carrier densities at nanostructured oxide interfaces

Relaxed (a) non-stoichiometric and (b) stoichiometric 1/3 LAO/STO nanowire heterostructure. Only one half of the symmetric slab in each supercell is shown. Ti- and Al-centered octahedra are represented by magenta and orange polyhedra, respectively. The numbers before the TiO2 notations denote the TiO2 layer number relative to the LAO/STO interface.