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Topological defects in hexagonal manganites: Inner structure and emergent electrostatics

hal.structure.identifierSchool of Applied and Engineering physics [Ithaca] [AEP Cornell]
dc.contributor.authorHOLTZ, Megan E.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSHAPOVALOV, Konstantin
hal.structure.identifierDepartment of Material Science and Engineering
hal.structure.identifierSchool of Applied and Engineering physics [Ithaca] [AEP Cornell]
dc.contributor.authorMUNDY, Julia A.
hal.structure.identifierDepartment of Physics [Ithaca]
dc.contributor.authorCHANG, Celesta S.
hal.structure.identifierMaterials Science Division [LBNL Berkeley]
hal.structure.identifierDepartment of Physics = Departement Physik [ETH Zürich] [D-PHYS]
dc.contributor.authorYAN, Zewu
hal.structure.identifierMaterials Science Division [LBNL Berkeley]
dc.contributor.authorBOURRET, Edith
hal.structure.identifierSchool of Applied and Engineering physics [Ithaca] [AEP Cornell]
hal.structure.identifierKavli Institute at Cornell for Nanoscale Science [KIC]
dc.contributor.authorMULLER, David A.
hal.structure.identifierDepartment of Materials
dc.contributor.authorMEIER, Dennis
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCANO, Andres
dc.date.issued2017-09-18
dc.identifier.issn1530-6984
dc.description.abstractEnDiverse topological defects arise in hexagonal manganites, such as ferroelectric vortices, as well as neutral and charged domain walls. The topological defects are intriguing because their low symmetry enables unusual couplings between structural, charge, and spin degrees of freedom, holding great potential for novel types of functional 2D and 1D systems. Despite the considerable advances in analyzing the different topological defects in hexagonal manganites, the understanding of their key intrinsic properties is still rather limited and disconnected. In particular, a rapidly increasing number of structural variants is reported without clarifying their relation, leading to a zoo of seemingly unrelated topological textures. Here, we combine picometer-precise scanning-transmission-electron microscopy with Landau theory modeling to clarify the inner structure of topological defects in Er1-xZrxMnO3. By performing a comprehensive parametrization of the inner atomic defect structure, we demonstrate that one primary length scale drives the morphology of both vortices and domain walls. Our findings lead to a unifying general picture of this type of structural topological defects. We further derive novel fundamental and universal properties, such as unusual bound-charge distributions and electrostatics at the ferroelectric vortex cores with emergent U(1) symmetry.
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enFerroics
dc.subject.endomain walls
dc.subject.enferroelectric vortices
dc.subject.entopological defects
dc.title.enTopological defects in hexagonal manganites: Inner structure and emergent electrostatics
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.nanolett.7b01288
dc.subject.halChimie/Matériaux
bordeaux.journalNano Letters
bordeaux.page5883-5890
bordeaux.volume17
bordeaux.issue10
bordeaux.peerReviewedoui
hal.identifierhal-01623786
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01623786v1
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