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Ionic Conductivity in Copper Selenides

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Abstract

For the first time, the results of investigations of ion transport phenomena in high-temperature modifications of single-crystalline copper selenide are presented depending on the temperature and the composition within the homogeneity region as well as the effect of the degree of perfection of single-crystalline samples on the ion transfer. It is found that the activation energy estimated from the temperature dependences of the ionic conductivity for perfect single crystals is significantly higher than in polycrystalline samples and increases with a deviation from stoichiometry. For single crystals, lower values of ionic conductivity are observed. The ionic conductivity in the temperature range of 573–723 K is 1.5–2 times higher for polycrystalline samples than for single crystals.

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Funding

This study was supported by the Russian Foundation for Basic Research, project no. 18-32-00675, “Computer Design of the Structure of the Nanocrystalline State, Model Calculations of the Band Structure and Lattice Dynamics of Copper Selenide and Silver Telluride.”

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Authors and Affiliations

  1. Bashkir State University, Sterlitamak Branch, 453103, Sterlitamak, Russia

    N. N. Bikkulova, A. R. Kurbangulov, L. V. Bikkulova & D. I. Safargaleev

  2. Yeltsin Ural Federal University, 620002, Yekaterinburg, Russia

    V. A. Gorbunov

  3. Bashkir State University, 450076, Ufa, Russia

    G. R. Akmanova & G. R. Nigmatullina

  4. Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    M. I. Alymov

Authors
  1. N. N. Bikkulova
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  2. V. A. Gorbunov
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  3. G. R. Akmanova
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  4. A. R. Kurbangulov
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  5. L. V. Bikkulova
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  6. D. I. Safargaleev
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  7. G. R. Nigmatullina
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  8. M. I. Alymov
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Corresponding authors

Correspondence to N. N. Bikkulova, V. A. Gorbunov, G. R. Akmanova or M. I. Alymov.

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Translated by V. Bukhanov

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Bikkulova, N.N., Gorbunov, V.A., Akmanova, G.R. et al. Ionic Conductivity in Copper Selenides. Dokl. Phys. 65, 265–268 (2020). https://doi.org/10.1134/S1028335820080017

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  • DOI: https://doi.org/10.1134/S1028335820080017

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