Vortex Domain Walls in Ferroelectrics

Zijian Hong; Sujit Das; Christopher Nelson; Ajay Yadav; Yongjun Wu; Javier Junquera; Long Qing Chen; Lane W. Martin; Ramamoorthy Ramesh

doi:10.1021/acs.nanolett.1c00404

Vortex Domain Walls in Ferroelectrics

Zijian Hong, Sujit Das, Christopher Nelson, Ajay Yadav, Yongjun Wu, Javier Junquera, Long Qing Chen, Lane W. Martin, Ramamoorthy Ramesh

electron Microscopy and Microanalysis

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

Controlling the domain formation in ferroelectric materials at the nanoscale is a fertile ground to explore emergent phenomena and their technological prospects. For example, charged ferroelectric domain walls in BiFeO3 and ErMnO3 exhibit significantly enhanced conductivity which could serve as the foundation for next-generation circuits (Estévez and Laurson, Phys. Rev. B 2015, 91, 054407). Here, we describe a concept in which polar vortices perform the same role as a ferroelectric domain wall in classical domain structures with the key difference being that the polar vortices can accommodate charged (i.e., head-to-head and tail-to-tail) domains, for example, in ferroelectric PbTiO3/dielectric SrTiO3 superlattices. Such a vortex domain wall structure can be manipulated in a reversible fashion under an external applied field.

Original language	English
Pages (from-to)	3533-3539
Number of pages	7
Journal	Nano Letters
Volume	21
Issue number	8
DOIs	https://doi.org/10.1021/acs.nanolett.1c00404
State	Published - Apr 28 2021

Funding

R.R. acknowledges support from the Office of Basic Energy Sciences, U.S. Department of Energy (DE-AC02-05CH11231). The work is supported by the Computational Materials Sciences Program funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, under Award Number DE-SC0020145 (L.Q.C.). L.Q.C. and L.W.M. acknowledge support from the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award Number DE-SC-0012375 for the development of novel ferroic heterostructures. Z.H. acknowledges the Extreme Science and Engineering Discovery Environment (XSEDE) cluster, which is supported by National Science Foundation Grant Number ACI-1548562, and specifically, it used the Bridges system, which is supported by NSF Award Number ACI-1445606, at the Pittsburgh Supercomputing Center (PSC), under the allocation DMR170006. Electron microscopy of superlattice structures was performed at the Molecular Foundry, LBNL, supported by the Office of Science, Office of Basic Energy Sciences, U.S. Department of Energy (DE-AC02-05CH11231).

Funders	Funder number
Extreme Science and Engineering Discovery Environment
Pittsburgh Supercomputing Center	DMR170006
XSEDE
National Science Foundation	ACI-1445606, ACI-1548562
U.S. Department of Energy	DE-AC02-05CH11231
Office of Science
Basic Energy Sciences	DE-SC-0012375, DE-SC0020145

Keywords

Charged domain wall
Ferroelectric superlattices
Phase-field simulations
Vortex domain wall

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10.1021/acs.nanolett.1c00404

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abstract = "Controlling the domain formation in ferroelectric materials at the nanoscale is a fertile ground to explore emergent phenomena and their technological prospects. For example, charged ferroelectric domain walls in BiFeO3 and ErMnO3 exhibit significantly enhanced conductivity which could serve as the foundation for next-generation circuits (Est{\'e}vez and Laurson, Phys. Rev. B 2015, 91, 054407). Here, we describe a concept in which polar vortices perform the same role as a ferroelectric domain wall in classical domain structures with the key difference being that the polar vortices can accommodate charged (i.e., head-to-head and tail-to-tail) domains, for example, in ferroelectric PbTiO3/dielectric SrTiO3 superlattices. Such a vortex domain wall structure can be manipulated in a reversible fashion under an external applied field.",

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AU - Yadav, Ajay

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AU - Junquera, Javier

AU - Chen, Long Qing

AU - Martin, Lane W.

AU - Ramesh, Ramamoorthy

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AB - Controlling the domain formation in ferroelectric materials at the nanoscale is a fertile ground to explore emergent phenomena and their technological prospects. For example, charged ferroelectric domain walls in BiFeO3 and ErMnO3 exhibit significantly enhanced conductivity which could serve as the foundation for next-generation circuits (Estévez and Laurson, Phys. Rev. B 2015, 91, 054407). Here, we describe a concept in which polar vortices perform the same role as a ferroelectric domain wall in classical domain structures with the key difference being that the polar vortices can accommodate charged (i.e., head-to-head and tail-to-tail) domains, for example, in ferroelectric PbTiO3/dielectric SrTiO3 superlattices. Such a vortex domain wall structure can be manipulated in a reversible fashion under an external applied field.

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Vortex Domain Walls in Ferroelectrics

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Keywords

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