Broken Time-reversal Symmetry in Josephson Junction with an Anderson impurity and multi band superconductors

Details Broken Time-reversal Symmetry in Josephson Junction with an Anderson impurity and multi band superconductors Broken Time-reversal Symmetry in Josephson Junction with an Anderson impurity and multi band superconductors

2009-05-05

arxiv.org/abs/0905.0625v2

Physics

Condensed Matter

Superconductivity

5 pages

Scientific paper

A Josephson junction consisting of an Anderson impurity weakly coupled with two-band and single-band superconductors exposes a time reversal breaking ground state when the coupling between the two bands exceeds a certain threshold. The critical regime occurs around local moment formation. This indicates a fundamental and distinct role of strong correlations: Driving a system into a time reversal breaking ground state. One of the observable consequences is that the impurity magnetization in this phase is reduced.

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