Parameter κ_{2} (T) for Strong Coupling Superconducting Alloys
Abstract
The parameter κ_{2} (T) is studied for superconducting alloys (dirty limit) in the electronphonon model. An equation for κ_{2} (T) is derived which contains the frequencydependent part of the order parameter right at the transition from the normal to the superconducting state and which can be used as a starting point for a detailed numerical calculation. At T_{c} κ_{2} is expressed in terms of other measurable quantities, and at T=0 a rough estimate of the order of magnitude of the strong coupling corrections to κ_{2BCS} is given. It is found that the strong coupling corrections to κ_{2} are very small, even for lead.
 Publication:

Physical Review B
 Pub Date:
 July 1970
 DOI:
 10.1103/PhysRevB.2.135
 Bibcode:
 1970PhRvB...2..135U