Low-Symmetry Phases in Ferroelectric Nanowires

Citations Over TimeTop 10% of 2010 papers

Abstract

Ferroelectric nanostructures have recently attracted much attention due to the quest of miniaturizing devices and discovering novel phenomena. In particular, studies conducted on two-dimensional and zero-dimensional ferroelectrics have revealed original properties and their dependences on mechanical and electrical boundary conditions. Meanwhile, researches aimed at discovering and understanding properties of one-dimensional ferroelectric nanostructures are scarce. The determination of the structural phase and of the direction of the polarization in one-dimensional ferroelectrics is of technological importance, since, e.g., a low-symmetry phase in which the polarization lies away from a highly symmetric direction typically generates phenomenal dielectric and electromechanical responses. Here, we investigate the phase transition sequence of nanowires made of KNbO(3) and BaTiO(3) perovskites, by combining X-ray diffraction, Raman spectroscopy, and first-principles-based calculations. We provide evidence of a previously unreported ferroelectric ground state of monoclinic symmetry and the tuning of the polarization's direction by varying factors inherent to the nanoscale.

Related Papers

• → Ferroelectricity at the Nanoscale: Basics and Applications(2013)19 cited
• → Structural and vibrational properties of phase-pure monoclinic NdLuO3 interlanthanides synthesized from nanostructured precursors(2016)5 cited
• → On the polymorphism of orthotelluric acid, H6TeO6(1968)10 cited
• Absorption of light in InP nanowire arrays(2014)
• → Investigation of Monoclinic Content on Clinically Retrieved Zirconia Heads(2005)2 cited