Broken time-reversal symmetry in Josephson junction involving two-band superconductors

Details Broken time-reversal symmetry in Josephson junction involving two-band superconductors Broken time-reversal symmetry in Josephson junction involving two-band superconductors

2008-09-19

arxiv.org/abs/0809.3343v1

EuroPhys. Lett.87, 17003 (2009)

Physics

Condensed Matter

Superconductivity

9 pages, 1 figure

Scientific paper

A novel time-reversal symmetry breaking state is found theoretically in the Josephson junction between the two-gap superconductor and the conventional s-wave superconductor. This occurs due to the frustration between the three order parameters analogous to the two antiferromagnetically coupled XY-spins put under a magnetic field. This leads to the interface states with the energies inside the superconducting gap. Possible experimental observations of this state with broken time-reversal symmetry are discussed.

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