Optical studies of ferroelectric and ferroelastic domain walls

Surface Structure of Ferroelastic Domain Walls: a Continuum Elasticity Approach Surface Structure of Ferroelastic Domain Walls: a Continuum Elasticity Approach

We present a model based on continuum elasticity and energy minimization for the study of ferroelastic domain walls close to a surface. We focus on walls orthogonal to the surface, and predict a double-peak structure in the surface values of the squared elastic strain, which is directly related to the chemical reactivity. We also compute the height proole, which can be measured, in principle, e...

Thickness-dependent evolutions of domain configuration and size in ferroelectric and ferroelectric-ferroelastic films

Mobility of Domain Walls in Proper Ferroelastic Martensites

Based on the Landau-Ginzberg free energy functional for an Oh-D4h proper ferroelastic martensitic transformation the mobility of a (I 10) twin boundary in a large bicrystal has been calculated by including dissipation in the approximation of the phonon viscosity model and by solving the inverse boundary value problem for the limiting case of strong shear modulus softening. Application to actual...

Non-Ising and chiral ferroelectric domain walls revealed by nonlinear optical microscopy

The properties of ferroelectric domain walls can significantly differ from those of their parent material. Elucidating their internal structure is essential for the design of advanced devices exploiting nanoscale ferroicity and such localized functional properties. Here, we probe the internal structure of 180° ferroelectric domain walls in lead zirconate titanate (PZT) thin films and lithium ta...

Depletion layers and domain walls in semiconducting ferroelectric thin films.

Commonly used ferroelectric perovskites are also wide-band-gap semiconductors. In such materials, the polarization and the space-charge distribution are intimately coupled, and this Letter studies them simultaneously with no a priori ansatz on either. In particular, we study the structure of domain walls and the depletion layers that form at the metal-ferroelectric interfaces. We find the coupl...