anisotropic ME equation and isotropic equation

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1504463450
Posts: 17
Joined: Thu Sep 29, 2022 12:51 pm
Affiliation: Physics-superconduct

anisotropic ME equation and isotropic equation

Post by 1504463450 »

Dear friends

I would like to ask you, when computing superconductivity, when do you solve the anisotropic ME equation, when do you solve the isotropic equation? And also, does McMillan's Tc formula only apply when it's isotropic?

Yours Sincerely

Shi

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

Re: anisotropic ME equation and isotropic equation

Post by hpaudya1 »

Hi Shi,

When there is anisotropy in superconducting gap, one need to solve anisotropic ME equations, for example in MgB2, and if there is no anisotropy, both aniso/iso give comparable Tc.

The McMillan Tc is close to the isotropic Tc.

Happy EPWing,
Hari

1504463450
Posts: 17
Joined: Thu Sep 29, 2022 12:51 pm
Affiliation: Physics-superconduct

Re: anisotropic ME equation and isotropic equation

Post by 1504463450 »

Dear friends
Thank you for your reply. May I ask you another question, how can I find Tc in the case of anisotropy? How can I tell if a superconductor is isotropic or anisotropic? Looking forward to your reply.
Yours sincerely
Shi

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

Re: anisotropic ME equation and isotropic equation

Post by hpaudya1 »

Hi Shi,

I would recommend you to read this paper; https://journals.aps.org/prb/pdf/10.110 ... .87.024505

You can see two examples, Pb (isotropic) and MgB2 (anisotropic).

Happy EPWing,
Hari

alexsunny123
Posts: 1
Joined: Sun Oct 23, 2022 10:14 am
Affiliation: bba

Re: anisotropic ME equation and isotropic equation

Post by alexsunny123 »

1504463450 wrote:
Thu Oct 13, 2022 1:14 am
Dear friends
Thank you for your reply. May I ask you another question, how can I find Tc in the case of anisotropy? How can I tell if a superconductor is isotropic or anisotropic? Looking forward to your reply.
Yours sincerely
Shi

thanks my issue has been fixed.

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