New type of collective modes in three-band superconductors

Details New type of collective modes in three-band superconductors New type of collective modes in three-band superconductors

2011-08-11

arxiv.org/abs/1108.2501v2

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures, numerical error fixed

Scientific paper

I consider a simple model of a three-band superconductor with repulsive interband interactions. In such a system the frustration associated with the odd number of gaps can lead to intrinsically complex time-reversal symmetry breaking (TRSB) order parameter. I show that in this state the fluctuations of the different gaps are strongly coupled, and this leads to the development of novel collective modes, in which phase and magnitude oscillations are mixed. Such modes exist for both weak or strong interband coupling.

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