Instanton Glass Generated by Noise in a Josephson-Junction Array

Details Instanton Glass Generated by Noise in a Josephson-Junction Array Instanton Glass Generated by Noise in a Josephson-Junction Array

2009-05-11

arxiv.org/abs/0905.1652v1

Physical Review Letters 103, 137001 (2009)

Physics

Condensed Matter

Superconductivity

4 pages, no figures

Scientific paper

10.1103/PhysRevLett.103.137001

We compute correlation function of a superconducting order parameter in a continuous model of a two-dimensional Josephson-junction array in the presence of a weak Gaussian noise. When the Josephson coupling is large compared to the charging energy the correlations in the Euclidian space decay exponentially at low temperatures regardless of the strength of the noise. We interpret such a state as a collective Cooper-pair insulator and argue that it resembles properties of disordered superconducting films.

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