Topology and control of self-assembled domain patterns in low-dimensional ferroelectrics

Y. Nahas (), S. Prokhorenko (), Q. Zhang (), V. Govinden, N. Valanoor and L. Bellaiche
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Y. Nahas: University of Arkansas
S. Prokhorenko: University of Arkansas
Q. Zhang: University of New South Wales
V. Govinden: University of New South Wales
N. Valanoor: University of New South Wales
L. Bellaiche: University of Arkansas

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Whilst often discussed as non-trivial phases of low-dimensional ferroelectrics, modulated polar phases such as the dipolar maze and the nano-bubble state have been appraised as essentially distinct. Here we emphasize their topological nature and show that these self-patterned polar states, but also additional mesophases such as the disconnected labyrinthine phase and the mixed bimeron-skyrmion phase, can be fathomed in their plurality through the unifying canvas of phase separation kinetics. Under compressive strain, varying the control parameter, i.e., the external electric field, conditions the nonequilibrium self-assembly of domains, and bridges nucleation and spinodal decomposition via the sequential onset of topological transitions. The evolutive topology of these polar textures is driven by the (re)combination of the elementary topological defects, merons and antimerons, into a plethora of composite topological defects such as the fourfold junctions, the bimeron and the target skyrmion. Moreover, we demonstrate that these manipulable defects are stable at room temperature and feature enhanced functionalities, appealing for devising future topological-based nanoelectronics.

Date: 2020
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DOI: 10.1038/s41467-020-19519-w

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