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    • Keywords


      Plasmons; phonons; transition temperature; coupling parameter; superconductors

    • Abstract


      The composition dependence of transition temperature in some ceramic superconductors (La2−x(Ba, Sr)xCuO4) was studied by modifying our earlier approach and developing a Fourier-transformed effective potential which involves the effect of two-dimensional (2D) acoustic plasmons. This potential was used to obtain the pairing (electron-electron attraction) parameter (λ), the averaged Coulomb repulsive parameter (μ*) and the cut-off 2D acoustic plasmon frequency (ωc) required to compute the superconducting transition temperature (Tc) from the strong coupling theory. The variations ofTc with compositions (x) obtained for La2−x(Ba, Sr)xCuO4 show reasonably good agreement with experimental data.

    • Author Affiliations


      R K Singh1 Dinesh Varshney1 N K Gaur1 A C Sharma1 2

      1. School of Physics, Barkatullah University, Bhopal - 462 026, India
      2. School of Physics, Jiwaji University, Gwalior - 474 001, India
    • Dates

  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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