Title

Uncompensated Polarization in Incommensurate Modulations of Perovskite Antiferroelectrics

Publication Date

11-2019

Department

Ames Laboratory; Materials Science and Engineering

Campus Units

Ames Laboratory, Materials Science and Engineering

OSTI ID+

1577118

Report Number

IS-J 10076

DOI

10.1103/PhysRevLett.123.217602

Journal Title

Physical Review Letters

Volume Number

123

Issue Number

21-22

First Page

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.

DOE Contract Number(s)

DMR-1700014; AC02-07CH11358; N00014-17-1-2818; HR0011-15-2-0038

Language

en

Department of Energy Subject Categories

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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