Investigate the effect of anisotropic order parameter on the specific heat of anisotropic two-band superconductors

TL;DR

This paper investigates how anisotropic order parameters influence the specific heat in two-band superconductors, providing analytical and numerical results that align well with experimental data.

Contribution

It introduces two models of anisotropic order parameters and compares their effects on specific heat, showing minimal differences and good fit with experiments.

Findings

Analytical expression for specific heat jump derived.

Numerical calculations show little difference between models.

Best fit to experimental data achieved with both models.

Abstract

The effect of anisotropic order parameter to specific heat of anisotropic two-band superconductors in BCS weak-coupling limit are investigated. An analytical specific heat jump and the numerical specific heat are shown by using anisotropic order parameters, and the electron-phonon interaction and non-electron-phonon interaction. The two model of anisotropic order parameters are used for numerical calculation that we find little effect to the numerical results . The specific heat jump of, and superconductors can fit well with the both of them. By comparing to experimental data overall range of temperature, the best fit is ,, and superconductors, respectively.