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강상관계 물질 연구단
강상관계 물질 연구단
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Constructing Polymorphic Nanodomains in BaTiO3 Films via Epitaxial Symmetry Engineering

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dc.contributor.authorWei Peng-
dc.contributor.authorJacob A. Zorn-
dc.contributor.authorJunsik Mun-
dc.contributor.authorMuhammad Sheeraz-
dc.contributor.authorChang Jae Roh-
dc.contributor.authorJun Pan-
dc.contributor.authorBo Wang-
dc.contributor.authorKun Guo-
dc.contributor.authorChang Won Ahn-
dc.contributor.authorYaping Zhang-
dc.contributor.authorKui Yao-
dc.contributor.authorJong Seok Lee-
dc.contributor.authorJin-Seok Chung-
dc.contributor.authorTae Heon Kim-
dc.contributor.authorLong-Qing Chen-
dc.contributor.authorMiyoung Kim-
dc.contributor.authorLingfei Wang-
dc.contributor.authorTae Won Noh-
dc.description.abstractFerroelectric materials owning a polymorphic nanodomain structure usually exhibit colossal susceptibilities to external mechanical, electrical, and thermal stimuli, thus holding huge potential for relevant applications. Despite the success of traditional strategies by means of complex composition design, alternative simple methods such as strain engineering have been intensively sought to achieve a polymorphic nanodomain state in lead-free, simple-composition ferroelectric oxides in recent years. Here, a nanodomain configuration with morphed structural phases is realized in an epitaxial BaTiO3 film grown on a (111)-oriented SrTiO3 substrate. Using a combination of experimental and theoretical approaches, it is revealed that a threefold rotational symmetry element enforced by the epitaxial constraint along the [111] direction of BaTiO3 introduces considerable instability among intrinsic tetragonal, orthorhombic, and rhombohedral phases. Such phase degeneracy induces ultrafine ferroelectric nanodomains (1-10 nm) with low-angle domain walls, which exhibit significantly enhanced dielectric and piezoelectric responses compared to the (001)-oriented BaTiO3 film with uniaxial ferroelectricity. Therefore, the finding highlights the important role of epitaxial symmetry in domain engineering of oxide ferroelectrics and facilitates the development of dielectric capacitors and piezoelectric devices. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim-
dc.publisherWILEY-V C H VERLAG GMBH-
dc.titleConstructing Polymorphic Nanodomains in BaTiO3 Films via Epitaxial Symmetry Engineering-
dc.contributor.affiliatedAuthorWei Peng-
dc.contributor.affiliatedAuthorTae Won Noh-
dc.identifier.bibliographicCitationADVANCED FUNCTIONAL MATERIALS, v.30, no.16, pp.1910569 --
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Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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