Figure 7
From: Atomic-scale mapping of dipole frustration at 90° charged domain walls in ferroelectric PbTiO3 films
2-D mappings of structural and electric behaviors showing the differences between 90° CDWs and 90° UCDWs.
(a, b) Out-of-plane lattice spacing mapping for the 90° PCDW and NCDW. (c, d) Lattice gradient mappings (lattice gradient of the out-of-plane lattice mappings along in-plane direction, mapped unit-cell by unit-cell) for the two types of domains. Note the alleviated lattice gradient across the 90° CDWs, especially of the 90° PCDW, compared with sharp lattice gradient across the 90° UCDWs. (e, f) Ps angle mappings for the two types of domains. The definition of 0°, 90°, 180° and 270° are marked with colored arrows with corresponding color-scale. In case of the 90° PCDW, the Ps angles are markedly disordered.
