The Electrical Conductivity of Strontium-Barium Niobate

We propose an explanation for the high electrical conductivity of the ferroelectric strontium-barium niobate. As the temperature T approaches the ferroelectric transition T c , the static dielectric constant diverges when a soft mode occurs. This divergence of reduces the donor binding energy, and i...

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Bibliographic Details
Published in:Journal of electronic materials 2013-07, Vol.42 (7), p.1375-1376
Main Authors: Mahan, G. D., Sofo, J. O.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity
Dielectric properties
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Electric currents
Electrical properties of specific thin films
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronics and Microelectronics
Exact sciences and technology
Instrumentation
Materials Science
Niobates, titanates, tantalates, pzt ceramics, etc
Optical and Electronic Materials
Physics
Solid State Physics
Thermodynamics
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Summary:We propose an explanation for the high electrical conductivity of the ferroelectric strontium-barium niobate. As the temperature T approaches the ferroelectric transition T c , the static dielectric constant diverges when a soft mode occurs. This divergence of reduces the donor binding energy, and increases the effective Bohr radius of the donor. The electrons bound to the donors become unbound, and the material becomes conductive.
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-012-2248-6