Collective modes in multiband superfluids and superconductors: Multiple dynamical classes

Details Collective modes in multiband superfluids and superconductors: Multiple dynamical classes Collective modes in multiband superfluids and superconductors: Multiple dynamical classes

2010-08-19

arxiv.org/abs/1008.3212v2

Phys. Rev. B 83, 060507(R) (2011)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.83.060507

One important way to characterize the states having a gauge symmetry spontaneously broken over multibands should be to look at their collective excitation modes. We find that a three-band system has multiple Leggett modes with significantly different masses, which can be classified into different dynamical classes according to whether multiple inter-band Josephson currents add or cancel. This provides a way to dynamically characterize multiband superconductivity while the pairing symmetry is a static property.

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