We demonstrate the formation of ferroelectric domain-wall polarons in a minimal two-dimensional lattice model of electrons interacting with rotating dipoles. Along the domain-wall, the rotors polarize in opposite directions, causing the electron to localize along a particular lattice direction. The rotor-electron coupling is identified as the origin of a structural instability in the crystal that leads to the domain-wall formation via a symmetry-breaking process. Our results provide the first theoretical description of ferroelectric polarons, as discussed in the context of soft semiconductors.
@article{arxiv.2407.19993,
title = {Domain-Wall Ferroelectric Polarons in a two-dimensional Rotor Lattice Model},
author = {Florian Kluibenschedl and Georgios M. Koutentakis and Ragheed Alhyder and Mikhail Lemeshko},
journal= {arXiv preprint arXiv:2407.19993},
year = {2025}
}