A superconductor-insulator transition in a one-dimensional array of Josephson junctions

Details A superconductor-insulator transition in a one-dimensional array of Josephson junctions A superconductor-insulator transition in a one-dimensional array of Josephson junctions

2003-05-12

arxiv.org/abs/cond-mat/0305245v1

J. Low Temp. Phys. 135, 245 (2004)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1023/B:JOLT.0000024551.89513.

We consider a one-dimensional Josephson junction array, in the regime where the junction charging energy is much greater than the charging energy of the superconducting islands. In this regime we critically reexamine the continuum limit description and establish the relationship between parameters of the array and the ones of the resulting sine-Gordon model. The later model is formulated in terms of quasi-charge. We argue that despite arguments to the contrary in the literature, such quasi-charge sine-Gordon description remains valid in the vicinity of the phase transition between the insulating and the superconducting phases. We also discuss the effects of random background charges, which are always present in experimental realizations of such arrays.

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