Ferroelectric instability in nanotubes and spherical nanoshells
1 CNRS, Université de Bordeaux - ICMCB, UPR 9048 - F-33600 Pessac, France
2 Physique Théorique des Matériaux (B5a), Université de Liège - B-4000 Liège, Belgium
Received: 29 October 2015
Accepted: 4 November 2015
The emergence of ferroelectricity in nanotubes and spherical nanoshells is studied theoretically. We determine semi-analytically the size and thickness dependence of the ferroelectric instability, as well as its dependence on the properties of the surrounding media and the corresponding interfaces. By properly tuning these factors, we demonstrate possible routes for enhancing the ferroelectric transition temperature and promoting the competition between irrotational and vortex-like states in the ultra-thin limit due to the specific topology of these nanoparticles.
PACS: 77.80.B- – Phase transitions and Curie point / 64.70.Nd – Structural transitions in nanoscale materials
© EPLA, 2015