Giant tunneling electroresistance arising from reversible partial barrier metallization in the NaTiO3/BaTiO3/LaTiO3 ferroelectric tunnel junction

Based on density functional calculations, two on/off states are obtained in the NaTiO₃/BaTiO₃/LaTiO₃ ferroelectric tunnel junction, leading to a TER ratio as high as 3.20 × 10⁸% due to reversible partial barrier metallization under an electric field.