Synthesis of the Conventional Phenomenological Theories of Superconductivity with Marginal Fermi Liquid Model

TL;DR

This paper integrates phenomenological models with Marginal Fermi Liquid theory to analyze thermodynamic and electrodynamic properties of cuprate superconductors, providing results consistent with experiments.

Contribution

It combines conventional phenomenological theories with Marginal Fermi Liquid models to derive temperature dependencies of critical magnetic fields and penetration depth in cuprate superconductors.

Findings

Good agreement with experimental data

Derived temperature dependence of critical magnetic field

Obtained expression for magnetic field penetration depth

Abstract

In this work we have done phenomenology based model calculations for some of the thermodynamic and electrodynamic properties of the strongly correlated superconductors of Cuprate type. The method involves the application of the theoretical result for electronic specific heat in the normal phase from Marginal Fermi Liquid theory to the Gorter-Casimir two fluid model to derive the temperature dependence of the critical magnetic field corresponding to a type-I system, using the standard variational technique. We also applied this modified two fluid scheme to the London theory and obtained an expression for the temperature dependence of the magnetic field penetration depth in the superconducting phase. Our results are in fairly good agreement with other theoretical results based on different approaches, as well as with the experimental results.