The emergence of three-dimensional chiral domain walls in polar vortices

Susarla, S and Hsu, S and Gómez-Ortiz, F and García-Fernández, P and Savitzky, BH and Das, S and Behera, P and Junquera, J and Ercius, P and Ramesh, R and Ophus, C (2023) The emergence of three-dimensional chiral domain walls in polar vortices. In: Nature Communications, 14 (1).

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Abstract

Chirality or handedness of a material can be used as an order parameter to uncover the emergent electronic properties for quantum information science. Conventionally, chirality is found in naturally occurring biomolecules and magnetic materials. Chirality can be engineered in a topological polar vortex ferroelectric/dielectric system via atomic-scale symmetry-breaking operations. We use four-dimensional scanning transmission electron microscopy (4D-STEM) to map out the topology-driven three-dimensional domain walls, where the handedness of two neighbor topological domains change or remain the same. The nature of the domain walls is governed by the interplay of the local perpendicular (lateral) and parallel (axial) polarization with respect to the tubular vortex structures. Unique symmetry-breaking operations and the finite nature of domain walls result in a triple point formation at the junction of chiral and achiral domain walls. The unconventional nature of the domain walls with triple point pairs may result in unique electrostatic and magnetic properties potentially useful for quantum sensing applications. © 2023, The Author(s).

Item Type:	Journal Article
Publication:	Nature Communications
Publisher:	Nature Research
Additional Information:	The copyright for this article belongs to the Nature Research.
Keywords:	dielectric property; emergence; handedness; polar vortex; polarization; quantum mechanics; three-dimensional modeling, article; chirality; handedness; information science; polarization; scanning transmission electron microscopy
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	27 Nov 2023 08:46
Last Modified:	27 Nov 2023 08:46
URI:	https://eprints.iisc.ac.in/id/eprint/82871

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