<bold> Fig. (A) shows a unit cell of the BaTiO3 (top), following Ti atoms motion resulted in the UP and DOWN polarization, (red arrow) points out the UP and DOWN polarization in a sectional view of BaTiO3 at equilibrium state(bottom).[1] </bold>
<bold> Fig. (A) shows a unit cell of the BaTiO3 (top), following Ti atoms motion resulted in the UP and DOWN polarization, (red arrow) points out the UP and DOWN polarization in a sectional view of BaTiO3 at equilibrium state(bottom).[2] </bold>