Volume 104, Number 4, November 2013
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||10 December 2013|
Electron transport properties of composite ferroelectrics
1 Department of Physics and Astronomy, California State University Northridge - Northridge, CA 91330, USA
2 Institute for Physics of Microstructures, Russian Academy of Science - Nizhny Novgorod, 603950, Russia
3 Materials Science Division, Argonne National Laboratory - Argonne, IL 60439, USA
4 Department of Physics, Northern Illinois University - DeKalb, IL 60115, USA
Received: 27 September 2013
Accepted: 15 November 2013
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.
PACS: 72.15.-v – Electronic conduction in metals and alloys / 77.80.-e – Ferroelectricity and antiferroelectricity / 72.80.Tm – Composite materials
© EPLA, 2013
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