Domain-Wall Ferroelectric Polarons in a two-dimensional Rotor Lattice Model

Florian Kluibenschedl; Georgios M. Koutentakis; Ragheed Alhyder; Mikhail Lemeshko

doi:10.1103/physrevlett.134.096302

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arXiv · 2407.19993

Domain-Wall Ferroelectric Polarons in a two-dimensional Rotor Lattice Model

Florian Kluibenschedl·Georgios M. Koutentakis·Ragheed Alhyder·Mikhail Lemeshko

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Abstract

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.

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Florian Kluibenschedl, Georgios M. Koutentakis, Ragheed Alhyder, Mikhail Lemeshko. 2025-01-03. Domain-Wall Ferroelectric Polarons in a two-dimensional Rotor Lattice Model. https://doi.org/10.1103/physrevlett.134.096302

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