Dynamics of the Phase Transition of Periodic Superconducting Networks

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Abstract
The critical behaviour of superconducting networks, as deduced from a study of the complex ac response of the system as a function of temperature, is found consistent with the vortex unbinding idea of the Kosterlitz-Thouless theory. The ac response of networks exposed to a perpendicular magnetic field shows a complex oscillatory dependence on the reduced flux per unit cell f=φ /φ0, with structures at integer and half-integer values of f.

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