Electron Transport Properties of Composite Ferroelectrics

Abstract

We study electron transport in composite ferroelectrics --- materials consisting of metallic grains embedded in a ferroelectric matrix. Due to its complex tunable morphology the thermodynamic properties of these materials can be essentially different from bulk or thin-film ferroelectrics. We calculate the conductivity of composite ferroelectrics by taking into account the interplay between charge localization, multiple grain boundaries, strong Coulomb repulsion, and ferroelectric order parameter. We show that the ferroelectricity plays a crucial role on the temperature behavior of the conductivity in the vicinity of the ferroelectric-paraelectric transition.

6 pages, 3 figures

References in corpus (4)

• Theoretical current-voltage characteristics of ferroelectric tunnel junctions
• Electroresistance effects in ferroelectric tunnel barriers
• Giant Tunneling Electroresistance Effect Driven by an Electrically Controlled Spin Valve at a Complex Oxide Interface
• Electron Transport in Nanogranular Ferromagnets

Cited by in corpus (4)

• Coupling of (ferro)electricity and magnetism through Coulomb blockade in Composite Multiferroics
• Interplay of Coulomb Blockade and Ferroelectricity in Nano-Granular Materials
• Probing near-interface ferroelectricity by conductance modulation of a nano-granular metal
• Influence of the Coulomb interaction on the exchange coupling in granular magnets