Rotational polarization nanotopologies in BaTiO3/SrTiO3 superlattices
arXiv:1911.06075 · doi:10.1039/c9nr08050c
Abstract
Ferroelectrics are characterized by domain structures as are other ferroics. At the nanoscale though, ferroelectrics may exhibit non-trivial or exotic polarization configurations under proper electrostatic and elastic conditions. These polar states may possess emerging properties not present in the bulk compounds and are promising for technological applications. Here, the observation of rotational polarization topologies at the nanoscale by means of aberration-corrected scanning transmission electron microscopy is reported in BaTiO3/SrTiO3 superlattices grown on cubic SrTiO3(001). The transition from a highly homogeneous polarization state to the formation of rotational nanodomains has been achieved by controlling the superlattice period while maintaining compressive clamping of the superlattice to the cubic SrTiO3 substrate. The nanodomains revealed in BaTiO3 prove that its nominal tetragonal structure also allows rotational polar textures.
arXiv commentPublished in Nanoscale. Open access
References in corpus (8)
- Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
- Theory of polarization enhancement in epitaxial BaTiO/SrTiO superlattices
- Superfluid behaviour of a two-dimensional Bose gas
- Tuning of the depolarization field and nanodomain structure in ferroelectric thin films
- Geometric frustration in compositionally modulated ferroelectrics
- Ferroelectric Phase Transitions in Ultra-thin Films of BaTiO3
- Domain evolution of BaTiO3 ultrathin films under electric field: a first-principles study
- In-situ x-ray diffraction and the evolution of polarization during the growth of ferroelectric superlattices