Green's function approach to the non-equilibrium superconductivity near the critical line

Progress in Non-equilibrium Green's Functions

Lipavský, Pavel^1

Faculty of Mathematics and Physics, Charles University, KB Karpov 3, Prague 2

12116, Czech Republic^1

关键词: Green's function approaches;    Multiple-scattering theory;    Non equilibrium;    Non-equilibrium superconductivities;    Quasiparticles;    Self-consistency;    Superconducting condensates;    Superconducting state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/696/1/012015/pdf
DOI  :  10.1088/1742-6596/696/1/012015

来源: IOP

【 摘 要 】

In spite of the absent friction of super-currents, normal currents affect the superconducting condensate. The BCS approach with Bogoliubov-Valutin quasiparticles is not suited for description of the normal current near the critical line. We review an alternative theory of the non-equilibrium superconductivity dealing exclusively with normal-state quasiparticles. It is based on the Thouless T-matrix criterion, which is extended to non-equilibrium. The problem of selfconsistency of the T-matrix in the superconducting state is examined and solved with the help of the multiple-scattering theory.