Strain-induced insulator–metal transition in ferroelectric BaTiO3 (001) surface: First-principles study
Yang Lin1, Wang Chang-An1, Liu Cong1, Qin Ming-Hui1, Lu Xu-Bing1, Gao Xing-Sen1, Zeng Min1, †, , Liu Jun-Ming1, 2
       

Band gap as a function of isotropic strain ε for TiO2-terminated BTO (001) surface.