Sequence of phase transitions induced in an array of Josephson junctions by their crossover to π-state
L. D. Landau Institute for Theoretical
Physics - Chernogolovka 142432, Russia
Accepted: 19 December 2009
We show that the transition of Josephson junctions between the conventional and π states caused by the decrease in temperature induces in a regular two-dimensional array of such junctions not just a single phase transition between two phases with different ordering but a sequence of two, three or four phase transitions. The corresponding phase diagrams are constructed for the cases of bipartite (square or honeycomb) and triangular lattices.
PACS: 74.81.Fa – Josephson junction arrays and wire networks / 64.60.De – Statistical mechanics of model systems (Ising model, Potts model, field-theory models, Monte Carlo techniques, etc.)
© EPLA, 2010