fig7
Figure 7. Exotic topological ferroelectric domains. (A) Representative examples of topological structures. Each arrow indicates the direction of polarization. Reproduced with permission[119]. Copyright 2020, Wiley-VCH Gmbh. (B) Atomic scale STEM image of flux-closure domains in PbTiO3/SrTiO3 multilayer films. Reproduced with permission. Yellow arrows represent the directions of polarization. Reproduced with permission[120]. Copyright 2015, American Association for the Advancement of Science.
