Influence of Bias on the Friction Imaging of Ferroelectric Domains in Single Crystal Barium Titanate Energy Storage Materials

Figure 3

The friction force between the voltage-biased tip and the domain of BaTiO₃ with the polarization direction parallel to the surface for the voltage bias is positive (left) and negative (right). It is assumed that the tip is scanned from left to right in the friction imaging. The Coulomb interaction between the charged tip and the inhomogeneous charge distribution of the domain leads to a zigzag energetic barrier distribution, which results in different friction force.