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Pressure dependence of the superconducting state parameters of metallic glass superconductor Mg70Zn30

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Abstract

Explicit expressions have been derived for the volume dependence of electron-phonon coupling strength (λ) and the Coulomb pseudopotential (μ*) considering the variation of Fermi momentum (κ F) and Debye temperature (θ D) with volume. Ashcroft’s model pseudopotential and RPA form of dielectric screening have been used for obtaining pressure dependence of transition temperature (T C) and the logarithmic volume derivative (Φ) of the effective interaction strength (N 0 V) for metallic glass superconductor Mg70Zn30. It has been observed that T C of the metallic glass Mg70Zn30 decreases rapidly with increase of pressure and the superconducting phase disappears at about 30% decrease of volume, for which the μ* curve shows a minimum and an elbow is formed in the Φ graph.

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Authors and Affiliations

  1. Department of Physics, Govt. MSJ College, 321 001, Bharatpur, India

    Manish Gupta

  2. Directorate of College Education, Govt. of Rajasthan, 302 004, Jaipur, India

    KS Sharma

  3. Department of Physics, University of Rajasthan, 302 004, Jaipur, India

    Lachhman Dass

Authors
  1. Manish Gupta
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  2. KS Sharma
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  3. Lachhman Dass
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Gupta, M., Sharma, K. & Dass, L. Pressure dependence of the superconducting state parameters of metallic glass superconductor Mg70Zn30 . Pramana - J Phys 53, 765–774 (1999). https://doi.org/10.1007/s12043-999-0110-z

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  • DOI: https://doi.org/10.1007/s12043-999-0110-z

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