Effects of anisotropy on the critical temperature in layered nonadiabatic superconductors
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, vol.384, no.3, pp.404-410, 2003 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 384 Issue: 3
- Publication Date: 2003
- Doi Number: 10.1016/s0921-4534(02)01995-0
- Journal Name: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.404-410
- Keywords: nonadiabatic superconductors, electron-phonon interactions, layered systems, Migdal theorem, ELECTRON-PHONON INTERACTION, TRANSITION-TEMPERATURE, MIGDALS THEOREM, VERTEX CORRECTIONS, PENETRATION-DEPTH, BREAKDOWN, CONDUCTIVITY, ENERGY, STATE
- Open Archive Collection: AVESIS Open Access Collection
- Ankara University Affiliated: No
Abstract
The generalized anisotropic Eliashberg theory is employed to study the critical temperature of layered nonadiabatic superconductors where the relevant phonon energy is comparable to the Fermi energy. We consider a two-dimensional model appropriate for cuprate compounds and recently discovered superconductor magnesium-diboride (MgB2) which also reveals layered structure. By using the McMillan approximation we present the result of calculations of critical temperature T-c. It is shown that the critical temperature is enhanced due to the influence of anisotropy and nonadiabaticity. (C) 2002 Elsevier Science B.V. All rights reserved.