Transport properties of clean and disordered Josephson junction arrays

Details Transport properties of clean and disordered Josephson junction arrays Transport properties of clean and disordered Josephson junction arrays

2009-10-14

arxiv.org/abs/0910.2651v2

Phys. Rev. B 80, 212504 (2009)

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.80.212504

We investigate the influence of quantum fluctuations and weak disorder on the vortex dynamics in a two-dimensional superconducting Berezinskii-Kosterlitz-Thouless system. The temperature below which quantum fluctuations dominate the vortex creep is determined, and the transport in this quantum regime is described. The crossover from quantum to classical regime is discussed and the quantum correction to the classical current-voltage relation is determined. It is found that weak disorder can effectively reduce the critical current as compared to that in the clean system.

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