Physical realization of the generalized fully frustrated XY model in an array of SFS junctions

S. E. Korshunov

Phys. Rev. B 92, 064506 – Published 10 August 2015

Abstract

We show that a physical realization of the phase diagram proposed by Minnhagen et al. [Phys. Rev. B 78, 184432 (2008)] for the so-called generalized fully frustrated XY model on a square lattice can be achieved in arrays of superconductor-ferromagnet-superconductor junctions near the transition of the junctions to the $π$ state. Moreover, the phase diagram with such a topology has to be reproduced twice, on both sides of the $0 − π$ transition.