ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Usadel's dirty-limit version of the Gorkov-Eilenberger theory including strong-coupling effects is used to calculate the lower critical field of superconducting alloys. The results of the (rigorous) numerical study, which is valid for all temperatures and Ginzburg-Landau parameters κ, are compared with experiments and with the existing weak-coupling theory. One achieves agreement with the bulk of the experimental results only if κ is properly adjusted. In addition, it is shown that a circular-cell approximation for the vortex state yields highly accurate magnetization curves, which are influenced in a characteristic way by strong electron-phonon coupling.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00116866
