Oxygen vacancy-induced topological nanodomains in ultrathin ferroelectric films

Abstract Oxygen vacancy in oxide ferroelectrics can be strongly coupled to the polar order via local strain and electric fields, thus holding the capability of producing and stabilizing exotic polarization patterns. However, despite intense theoretical studies, an explicit microscopic picture to cor...

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Autores principales:	Wei Peng, Junsik Mun, Qidong Xie, Jingsheng Chen, Lingfei Wang, Miyoung Kim, Tae Won Noh
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
Acceso en línea:	https://doaj.org/article/fa18c281c99e4763aa41d16ef8b5d264
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spelling	oai:doaj.org-article:fa18c281c99e4763aa41d16ef8b5d2642021-12-02T17:15:32ZOxygen vacancy-induced topological nanodomains in ultrathin ferroelectric films10.1038/s41535-021-00349-y2397-4648https://doaj.org/article/fa18c281c99e4763aa41d16ef8b5d2642021-05-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00349-yhttps://doaj.org/toc/2397-4648Abstract Oxygen vacancy in oxide ferroelectrics can be strongly coupled to the polar order via local strain and electric fields, thus holding the capability of producing and stabilizing exotic polarization patterns. However, despite intense theoretical studies, an explicit microscopic picture to correlate the polarization pattern and the distribution of oxygen vacancies remains absent in experiments. Here we show that in a high-quality, uniaxial ferroelectric system, i.e., compressively strained BaTiO3 ultrathin films (below 10 nm), nanoscale polarization structures can be created by intentionally introducing oxygen vacancies in the film while maintaining structure integrity (namely no extended lattice defects). Using scanning transmission electron microscopy, we reveal that the nanodomain is composed of swirling electric dipoles in the vicinity of clustered oxygen vacancies. This finding opens a new path toward the creation and understanding of the long-sought topological polar objects such as vortices and skyrmions.Wei PengJunsik MunQidong XieJingsheng ChenLingfei WangMiyoung KimTae Won NohNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 Wei Peng Junsik Mun Qidong Xie Jingsheng Chen Lingfei Wang Miyoung Kim Tae Won Noh Oxygen vacancy-induced topological nanodomains in ultrathin ferroelectric films
description	Abstract Oxygen vacancy in oxide ferroelectrics can be strongly coupled to the polar order via local strain and electric fields, thus holding the capability of producing and stabilizing exotic polarization patterns. However, despite intense theoretical studies, an explicit microscopic picture to correlate the polarization pattern and the distribution of oxygen vacancies remains absent in experiments. Here we show that in a high-quality, uniaxial ferroelectric system, i.e., compressively strained BaTiO3 ultrathin films (below 10 nm), nanoscale polarization structures can be created by intentionally introducing oxygen vacancies in the film while maintaining structure integrity (namely no extended lattice defects). Using scanning transmission electron microscopy, we reveal that the nanodomain is composed of swirling electric dipoles in the vicinity of clustered oxygen vacancies. This finding opens a new path toward the creation and understanding of the long-sought topological polar objects such as vortices and skyrmions.
format	article
author	Wei Peng Junsik Mun Qidong Xie Jingsheng Chen Lingfei Wang Miyoung Kim Tae Won Noh
author_facet	Wei Peng Junsik Mun Qidong Xie Jingsheng Chen Lingfei Wang Miyoung Kim Tae Won Noh
author_sort	Wei Peng
title	Oxygen vacancy-induced topological nanodomains in ultrathin ferroelectric films
title_short	Oxygen vacancy-induced topological nanodomains in ultrathin ferroelectric films
title_full	Oxygen vacancy-induced topological nanodomains in ultrathin ferroelectric films
title_fullStr	Oxygen vacancy-induced topological nanodomains in ultrathin ferroelectric films
title_full_unstemmed	Oxygen vacancy-induced topological nanodomains in ultrathin ferroelectric films
title_sort	oxygen vacancy-induced topological nanodomains in ultrathin ferroelectric films
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/fa18c281c99e4763aa41d16ef8b5d264
work_keys_str_mv	AT weipeng oxygenvacancyinducedtopologicalnanodomainsinultrathinferroelectricfilms AT junsikmun oxygenvacancyinducedtopologicalnanodomainsinultrathinferroelectricfilms AT qidongxie oxygenvacancyinducedtopologicalnanodomainsinultrathinferroelectricfilms AT jingshengchen oxygenvacancyinducedtopologicalnanodomainsinultrathinferroelectricfilms AT lingfeiwang oxygenvacancyinducedtopologicalnanodomainsinultrathinferroelectricfilms AT miyoungkim oxygenvacancyinducedtopologicalnanodomainsinultrathinferroelectricfilms AT taewonnoh oxygenvacancyinducedtopologicalnanodomainsinultrathinferroelectricfilms
_version_	1718381297158586368

Oxygen vacancy-induced topological nanodomains in ultrathin ferroelectric films

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