Campus Units

Materials Science and Engineering, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

11-2019

Journal or Book Title

Physical Review Letters

Volume

123

Issue

21-22

First Page

217602

DOI

10.1103/PhysRevLett.123.217602

Abstract

Complex polar structures of incommensurate modulations (ICMs) are revealed in chemically modified PbZrO3 perovskite antiferroelectrics using advanced transmission electron microscopy techniques. The Pb-cation displacements, previously assumed to arrange in a fully compensated antiparallel fashion, are found to be either antiparallel, but with different magnitudes, or in a nearly orthogonal arrangement in adjacent stripes in the ICMs. Ab initio calculations corroborate the low-energy state of these arrangements. Our discovery corrects the atomic understanding of ICMs in PbZrO3-based perovskite antiferroelectrics.

Comments

This article is published as Ma, Tao, Zhongming Fan, Bin Xu, Tae-Hoon Kim, Ping Lu, Laurent Bellaiche, Matthew J. Kramer, Xiaoli Tan, and Lin Zhou. "Uncompensated polarization in incommensurate modulations of perovskite antiferroelectrics." Physical Review Letters 123, no. 21-22 (2019): 217602. DOI: 10.1103/PhysRevLett.123.217602. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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