Examination of long-range electrostatic interaction for ferroelectricity in view of intrinsic free electrons/holes at polarization discontinuities

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Abstract

Efforts for realizing microscopic and nanoscopic ferroelectric devices have contributed to uncover new prospects of the ferroelectricity. Examples of such efforts are memories based on the ferroelectric field effect. In this article, we discuss the origin of the ferroelectricity in metal oxides in view of these applied researches. In particular, the long-range electrostatic interactions are presumably not the primary origin of ferroelectricity, because it is incompatible with the experimental existence of free electrons/holes at polarization discontinuities. On the other hand, local covalent interactions are compatible with free electrons/holes at polarization discontinuities can explain ferroelectricity as well as the existence of multiferroics.

Original languageEnglish
Pages (from-to)22-33
Number of pages12
JournalFerroelectrics
Volume433
Issue number1
DOIs
Publication statusPublished - Jan 1 2012

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Ferroelectricity
ferroelectricity
Coulomb interactions
free electrons
discontinuity
examination
Polarization
electrostatics
Electrons
polarization
Ferroelectric devices
interactions
Oxides
Ferroelectric materials
metal oxides
Metals
Data storage equipment

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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abstract = "Efforts for realizing microscopic and nanoscopic ferroelectric devices have contributed to uncover new prospects of the ferroelectricity. Examples of such efforts are memories based on the ferroelectric field effect. In this article, we discuss the origin of the ferroelectricity in metal oxides in view of these applied researches. In particular, the long-range electrostatic interactions are presumably not the primary origin of ferroelectricity, because it is incompatible with the experimental existence of free electrons/holes at polarization discontinuities. On the other hand, local covalent interactions are compatible with free electrons/holes at polarization discontinuities can explain ferroelectricity as well as the existence of multiferroics.",
author = "Yukio Watanabe",
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