Abstract:
The inclusion of nonadiabatic corrections to the electron-phonon interaction leads to a strong momentum dependence in the generalized Eliashberg equations beyond Migdal's limit. For a s-wave symmetry of the order parameter, this induced momentum dependence leads to an enhancement of when small momentum transfer is dominant. Here we study how the d-wave symmetry affects the above behavior. We find that the nonadiabatic corrections depend only weakly on the symmetry of the order parameter provided that only small momentum scatterings are allowed for the electron-phonon interaction. In this situation, We show that also for a d-wave symmetry of the order parameter, the nonadiabatic corrections enhance . We also discuss the possible interplay and crossover between s- and d-wave depending on the material's parameters.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received 12 May 2000
Rights and permissions
About this article
Cite this article
Paci, P., Grimaldi, C. & Pietronero, L. -wave nonadiabatic superconductivity. Eur. Phys. J. B 17, 235–243 (2000). https://doi.org/10.1007/s100510070137
Issue Date:
DOI: https://doi.org/10.1007/s100510070137