Magnetic screening in proximity effect Josephson-junction arrays

Abstract

The modulation with magnetic field of the sheet inductance measured on proximity effect Josephson-junction arrays (JJAs) is progressively vanishing on lowering the temperature, leading to a low temperature field-independent response. This behaviour is consistent with the decrease of the two-dimensional penetration length below the lattice parameter. Low temperature data are quantitatively compared with theoretical predictions based on the XY model in absence of thermal fluctuations. The results show that the description of a JJA within the XY model is incomplete and the system is put well beyond the weak screening limit which is usually assumed in order to invoke the well known frustrated XY model describing classical Josephson-junction arrays.

6 pages, 5 figures

References in corpus (11)

• Quantum Phase Transitions and Vortex Dynamics in Superconducting Networks
• Supercurrent in a mesoscopic proximity wire
• Vortex ordering in fully-frustrated superconducting systems with dice lattice
• Vortex correlations in a fully frustrated two-dimensional superconducting network
• Electrostatic Modulation of the Superfluid Density in a Ultrathin La2-xSrxCuO4 Film
• Fluctuation induced vortex pattern and its disordering in the fully frustrated XY model on a dice lattice
• Screening current effects in Josephson junction arrays
• Uniformly frustrated XY model without vortex-pattern ordering
• Frustration phenomena in Josephson junction arrays on a dice lattice
• Localization Effect in a 2D Superconducting Network without Disorder
• Kinetic Inductance of Josephson Junction Arrays: Dynamic and Equilibrium Calculations