Implications of a small Fermi surface are discussed. We demonstrate that superconductivity in this system can be described in terms of two coupled condensates. The two condensates result in a collective excitation corresponding to a relative phase oscillation, a phason. We discuss the possibility of searching for this collective excitation in the dynamic resistance of a SQUID.
|Number of pages||6|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|Publication status||Published - 1 Dec 1997|
- Phase oscillations in two condensate superconductors