Trimerization-polarization domains in ferroelectric hexagonal YMnO3 were resolved in all three spatial dimensions by piezoresponse force microscopy. Their topology is dominated by electrostatic effects with a range of 100 unit cells and reflects the unusual electrostatic origin of the spontaneous polarization. The response of the domains to locally applied electric fields explains difficulties in transferring YMnO3 into a single-domain state. Our results demonstrate that the wealth of non-displacive mechanisms driving ferroelectricity that emerged from the research on multiferroics are a rich source of alternative types of domains and domain-switching phenomena.
@article{arxiv.1101.3565,
title = {Electrostatic topology of ferroelectric domains in YMnO$_3$},
author = {Tobias Jungk and Ákos Hoffmann and Manfred Fiebig and Elisabeth Soergel},
journal= {arXiv preprint arXiv:1101.3565},
year = {2015}
}