Two-dimensional metallic behavior at polar MgO/BaTiO3 (110) interfaces*
Du Yan-Linga),b), Wang Chun-Leia), Li Ji-Chaoa)†, Zhang Xin-Huaa), Wang Fu-Ninga), Liu Jiana), Zhu Yuan-Hua), Yin Naa), Mei Liang-Moa)
       
(a) The 3D isovalue surface (yellow contour) of the local density of states contributing to the peak at the Fermi level. (b) The partial density of states grouped by layers of the (MgO)8/(BaTiO3)5 (110) heterostructure with a p-type interface. The data (plot of a charge isosurface and PDOS) for each layer are aligned on the same vertical position. The Fermi level is highlighted by the black dashed line.