Superconducting gap using isotropic Eliashberg equation.

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Bikash
Posts: 4
Joined: Mon Apr 03, 2023 12:54 pm
Affiliation: Post-doctoral researcher

Superconducting gap using isotropic Eliashberg equation.

Post by Bikash »

Dear all,

I am calculating the superconducting properties of some systems.
In the output, the T_c value is around 9 K and the BCS gap is 1.43 meV.
Now, If I solve the isotropic Eliashberg equation at temperature 9.5 K
I am getting superconducting gaps around 2.4 meV. Is this possible? Is this
mean that my calculations are not in convergence?

With regards,
Bikash Patra,
TIFR, Mumbai

hpaudya1
Posts: 190
Joined: Tue Mar 21, 2017 7:11 pm
Affiliation:

Re: Superconducting gap using isotropic Eliashberg equation.

Post by hpaudya1 »

Hi Bikash,

This is possible. The BCS gaps is only an initial guess while solving Eliashberg equations. There are other parameters, such as lambda, to calculate gap. You need to provide us further information (for eg. k/q mesh) including the plots (eg. gap vs tc) to understand if the calculation is converged or not.

Happy EPWing,
Hari

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