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)
       
Relaxed structure of the (MgO)8/(BaTiO3)5 (110) heterostructure with a p-type (MgO)0/(O2)4 − interface, containing 8 unit cells (four layers) of MgO and 5 unit cells of BaTiO3 within the heterostructure. Index n denotes atomic monolayers and is increasing with the distance from the surface.