Impact of 3D Curvature on the Polarization Orientation in Non-Ising Domain Walls

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung



Ferroelectric domain boundaries are quasi-two-dimensional functional interfaces with high prospects for nanoelectronic applications. Despite their reduced dimensionality, they can exhibit complex non-Ising polarization configurations and unexpected physical properties. Here, the impact of the three-dimensional (3D) curvature on the polarization profile of nominally uncharged 180° domain walls in LiNbO3 is studied using second-harmonic generation microscopy and 3D polarimetry analysis. Correlations between the domain-wall curvature and the variation of its internal polarization unfold in the form of modulations of the Néel-like character, which we attribute to the flexoelectric effect. While the Néel-like character originates mainly from the tilting of the domain wall, the internal polarization adjusts its orientation due to the synergetic upshot of dipolar and monopolar bound charges and their variation with the 3D curvature. Our results show that curved interfaces in solid crystals may offer a rich playground for tailoring nanoscale polar states.


Seiten (von - bis)795-803
FachzeitschriftNano letters
PublikationsstatusVeröffentlicht - 20 Jan. 2023

Externe IDs

ORCID /0000-0002-2484-4158/work/150330980
Scopus 85146864569
Mendeley 5fbfcfeb-023e-388a-b986-3c7918993a03


Forschungsprofillinien der TU Dresden


  • Ferroelectric domain walls, non-Ising domain walls, phase-field simulations, second-harmonic generation, lithium niobate, curvature