Appropriate Value of Permittivity for Depolarization Field and Universal Instability of Insulating Ferroelectric Phase in Single-Domain State

We redefine the permittivity for the depolarization field and show that in most situations the permittivity for depolarization field should be unity, and show a proper expression for depolarization field. Based on this expression a generic consideration of ferroelectrics undergoing the first order t...

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Bibliographic Details
Published in:Ferroelectrics 2010-10, Vol.406 (1), p.35-38
Main Author: Watanabe, Yukio
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Depolarization
Dielectric constant
Dielectric properties of solids and liquids
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
ferroelectric
Ferroelectric materials
Ferroelectricity
Ferroelectrics
field effect
Instability
Insulation
Permittivity
Phase transitions
Physics
Polarization and depolarization
Screening
size
Two dimensional
Unity
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Summary:We redefine the permittivity for the depolarization field and show that in most situations the permittivity for depolarization field should be unity, and show a proper expression for depolarization field. Based on this expression a generic consideration of ferroelectrics undergoing the first order transition shows that free standing two-dimensional ferroelectric phase cannot exist in a single domain state without a non-dielectric screening mechanism.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2010.484328