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TT: Fachverband Tiefe Temperaturen

TT 14: Superconductivity: (General) Theory

TT 14.3: Talk

Monday, March 7, 2016, 15:30–15:45, H19

The role of Coulomb interaction for fluctuation corrections to the BCS theory of superconductivity — •Sonja Fischer and Jörg Schmalian — Institut für Theorie der Kondensierten Materie, KIT, Germany

We study fluctuation corrections to the gap equation of the BCS theory of superconductivity, taking into account the role of long ranged Coulomb interactions that is known to transfer superconducting phase fluctuations to the electron plasma frequency. Particular attention is paid to the previously discussed [1] cancellation of amplitude and phase fluctuation corrections in neutral superconductors.
S. Kos A. J. Millis, and A. I. Larkin, PRB 70, 214531 (2004)