Functional superconductor interfaces from broken time-reversal symmetry

Details Functional superconductor interfaces from broken time-reversal symmetry Functional superconductor interfaces from broken time-reversal symmetry

2009-08-20

arxiv.org/abs/0908.2975v1

Phys. Rev. Lett. 104, 197001 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures, RevTeX

Scientific paper

10.1103/PhysRevLett.104.197001

The breaking of time-reversal symmetry in a triplet superconductor Josephson junction is shown to cause a magnetic instability of the tunneling barrier. Using a Ginzburg-Landau analysis of the free energy, we predict that this novel functional behaviour reflects the formation of an exotic Josephson state, distinguished by the existence of fractional flux quanta at the barrier. The crucial role of the orbital pairing state is demonstrated by studying complementary microscopic models of the junction. Signatures of the magnetic instability are found in the critical current of the junction.

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