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Van der Waals Gaps in Sm1+x Ba2−x Cu3O y and Their Effect on Superconductivity

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Abstract

We have used electron–positron annihilation to study superconducting cuprates Sm1+x Ba2−x Cu3O y . We have determined the average radii for oxygen ions in Sm1+x Ba2−x Cu3O y . Taking into account the ion coordinates and their radii, we have constructed a geometric model for the arrangement of copper and oxygen ions in CuO2 layers in the [b, c] plane, responsible for the superconductivity. From these data, we have determined the length of the ionic/covalent bonds and the width of the interionic gaps. We have established the effect of the features of the atomic structure of Sm1+x Ba2−x Cu3O y on the superconducting transition temperature T c and we have shown that T c increases as ΔX inceases.

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Authors and Affiliations

  1. G. V. Kurdyumov Institute of Metal Physics, National Academy of Sciences of Ukraine, 36 Akademika Vernads'kogo Bul'var, 03142, Kyiv, Ukraine

    M. M. Nishchenko & S. P. Likhtorovich

  2. Taras Shevchenko Kyiv National University, 64 Volodymyrs'ka Vul., 01033, Kyiv, Ukraine

    V. A. Drozd, S. A. Nedil'ko & I. L. Baginskii

Authors
  1. M. M. Nishchenko
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  2. S. P. Likhtorovich
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  3. V. A. Drozd
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  4. S. A. Nedil'ko
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  5. I. L. Baginskii
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Nishchenko, M.M., Likhtorovich, S.P., Drozd, V.A. et al. Van der Waals Gaps in Sm1+x Ba2−x Cu3O y and Their Effect on Superconductivity. Theoretical and Experimental Chemistry 38, 162–167 (2002). https://doi.org/10.1023/A:1019600901671

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