Non-equilibrium transitions in fully frustrated Josephson junction arrays

Details Non-equilibrium transitions in fully frustrated Josephson junction arrays Non-equilibrium transitions in fully frustrated Josephson junction arrays

2001-02-20

arxiv.org/abs/cond-mat/0102356v1

Phys. Rev. Lett. 87, 017004 (2001)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.87.017004

We study the effect of thermal fluctuations in a fully frustrated Josephson junction array driven by a current I larger than the apparent critical current I_c(T). We calculate numerically the behavior of the chiral order parameter of Z_2 symmetry and the transverse helicity modulus (related to the U(1) symmetry) as a function of temperature. We find that the Z_2 transition occurs at a temperature T_{Z_2}(I) which is lower than the temperature T_{U(1)}(I) for the U(1) transition. Both transitions could be observed experimentally from measurements of the longitudinal and transverse voltages.

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