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The Electrical Conductivity of Strontium-Barium Niobate

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Abstract

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 \(\varepsilon(0)\) diverges when a soft mode occurs. This divergence of \(\varepsilon(0)\) 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.

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Authors and Affiliations

  1. Department of Physics, Pennsylvania State University, University Park, PA, 16802, USA

    G. D. Mahan & J. O. Sofo

  2. Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA

    J. O. Sofo

Authors
  1. G. D. Mahan
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  2. J. O. Sofo
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Correspondence to G. D. Mahan.

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Mahan, G.D., Sofo, J.O. The Electrical Conductivity of Strontium-Barium Niobate. J. Electron. Mater. 42, 1375–1376 (2013). https://doi.org/10.1007/s11664-012-2248-6

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  • DOI: https://doi.org/10.1007/s11664-012-2248-6

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