Nonequilibrium Transitions in Fully Frustrated Josephson Junction Arrays
Verónica I. Marconi, Daniel Domínguez
DOI 10.1103/PhysRevLett.87.017004 · Physical Review Letters
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Abstract
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 Ic(T). We calculate numerically the behavior of the chiral order parameter of Z2 symmetry and the transverse helicity modulus [related to the U(1) symmetry] as a function of temperature. We find that the Z2 transition occurs at a temperature TZ2(I) which is lower than the temperature TU(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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