Figure 5: DFT calculations.
From: Anisotropic two-dimensional electron gas at the LaAlO3/SrTiO3 (110) interface
(a) Schematic cell structure of LaAlO3/SrTiO3 (110) interface with TiO-terminated SrTiO3 (110) for six monolayers of LaAlO3. (b) The total density of states for different numbers N of LaAlO3 monolayers deposited on SrTiO3 (110) clearly shows the band gap decrease with increasing N and an insulator to metal transition occurring at 4 uc. (c) The partial density of states for O-2p projected onto each layer for N=6 monolayers of LaAlO3 deposited onto TiO-terminated (110) SrTiO3. Here the top of valance band for each monolayer is indicated by dashed lines. The Fermi level is denoted by EFermi. Here IF represents interface.
