T<inf>c</inf>of anisotropic superconductors containing non-magnetic resonant states
The effects of resonant scattering by non-magnetic Anderson impurities on the transition temperatures of anistropic superconductors are investigated within the framework of the weak coupling BCS theory and the strong coupling Migdal-Eliashberg theory. The separable anisotropic interaction V kk′ = [1...
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Article |
| Published: |
2018
|
| Subjects: | |
| Online Access: | https://repository.li.mahidol.ac.th/handle/123456789/9876 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Mahidol University |
| Summary: | The effects of resonant scattering by non-magnetic Anderson impurities on the transition temperatures of anistropic superconductors are investigated within the framework of the weak coupling BCS theory and the strong coupling Migdal-Eliashberg theory. The separable anisotropic interaction V kk′ = [1 + a k (Ω)]g[1 + a k′ (Ω′)] - V c is used used in the calculations based on the BCS formalism while the separable spectral function α 2 F kk′ (ω) = [1 + a k (Ω)]α 2 F(ω)[1 + a k′ (Ω′)] is used in the calculations based on the square well model λ θθ of the Migdal-Eliashberg formalism. It is shown that the two formalisms lead to expressions for T c which are very similar. © 1986. |
|---|