Restoring gauge invariance in conventional fluctuation corrections to a superconductor
Restoring gauge invariance in conventional fluctuation corrections to a superconductor
The complete set of diagrams for conventional fluctuation corrections to the normal state of an ultraclean superconductor is derived using the functional-integral approach. The standard diagrams which characterize the fluctuation phase of a superconductor, namely, Aslamazov-Larkin, Maki-Thompson, and Density of States, are obtained and proved to be insufficient to produce …