Two-dimensional metallic behavior at polar MgO/BaTiO<sub>3</sub> (110) interfaces<xref ref-type="fn" rid="cpb142049fn1">*</xref>

Two-dimensional metallic behavior at polar MgO/BaTiO₃ (110) interfaces*

Du Yan-Ling^a),^b), Wang Chun-Lei^a), Li Ji-Chao^a)†, Zhang Xin-Hua^a), Wang Fu-Ning^a), Liu Jian^a), Zhu Yuan-Hu^a), Yin Na^a), Mei Liang-Mo^a)

(a) The spatial distributions of free electrons (yellow contour) of the interface Ti atom; this is the top view of the interface in Fig. 2(a) . (b) The PDOS of the interface Ti 3d states.