Dynamics and Effective Actions of BCS Superconductors

Details Dynamics and Effective Actions of BCS Superconductors Dynamics and Effective Actions of BCS Superconductors

1997-03-12

arxiv.org/abs/cond-mat/9703124v1

Physics

Condensed Matter

Superconductivity

14 pages Revtex

Scientific paper

We derive effective dynamical theories for metals and BCS superconductors, based on the effective action formalism. Both the metallic regime $T\gtrsim T_{C}$ and the superconducting regime $T\ll T_{C}$ are studied in the clean and dirty limit. Furthermore, we consider the effect of particle-hole asymmetry in the band structure. Using gauge invariance, the electrodynamics of the problem is formulated in a transparent way. The effective actions are useful starting points for treating dynamical problems involving BCS superconductors.

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