Diluted Josephson-junction arrays in a magnetic field: phase coherence and vortex glass thresholds

Details Diluted Josephson-junction arrays in a magnetic field: phase coherence and vortex glass thresholds Diluted Josephson-junction arrays in a magnetic field: phase coherence and vortex glass thresholds

1998-02-03

arxiv.org/abs/cond-mat/9802032v1

Phys. Rev. B57, 10314 (1998).

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.57.10314

The effects of random dilution of junctions on a two-dimensional Josephson-junction array in a magnetic field are considered. For rational values of the average flux quantum per plaquette $f$, the superconducting transition temperature vanishes, for increasing dilution, at a critical value $x_S(f)$, while the vortex ordering remains stable up to $x_{VL}>x_S$, much below the value $x_p$ corresponding to the geometric percolation threshold. For $ x_{VL}

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