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Effect of pressure on the behavior of nontransition metallic superconductors

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Czechoslovak Journal of Physics B Aims and scope

Abstract

An explicit expression has been derived for the volume dependence of electron-phonon coupling strength (Λ) by using a recently proposed quadratic form of the screened pseudopotential and by considering the variation of Fermi momentum with volume. Variation of Coulomb pseudopotential (μ *) has also been explicitly considered by varying the Fermi momentum. Dependence of transition temperatureT c and the logarithm of the effective interaction strength (N 0 V) on the volume has been studied for eight nontransition metallic superconductors. A linear drop inT c for small values of (−ΔΩ/Ω 0) as well as the calculated values ofφ=∂ InN 0 V/∂ InΩ, exhibits better matching with the experimental data, as compared to the earlier theoretical results.

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Authors and Affiliations

  1. Department of Physics, M. S. J. College, 321 001, Bharatpur, India

    R. Sharma, K. S. Sharma & L. Dass

  2. University of Rajashtan, 302 004, Jaipur, India

    L. Dass

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  1. R. Sharma
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  2. K. S. Sharma
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  3. L. Dass
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Sharma, R., Sharma, K.S. & Dass, L. Effect of pressure on the behavior of nontransition metallic superconductors. Czech J Phys 38, 611–621 (1988). https://doi.org/10.1007/BF01605963

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  • DOI: https://doi.org/10.1007/BF01605963

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