Superconducting Fluctuations in Granular Metals with a Large Coupling Between the Grains

Details Superconducting Fluctuations in Granular Metals with a Large Coupling Between the Grains Superconducting Fluctuations in Granular Metals with a Large Coupling Between the Grains

2001-08-06

arxiv.org/abs/cond-mat/0108104v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 7 figures; to appear in Physical Review B march 2002

Scientific paper

10.1103/PhysRevB.65.094516

We study the fluctuation conductivity of superconducting granular metals at low temperatures and strong magnetic field destroying the Cooper pairs. Explicit calculations are performed for larger values of the coupling between the grains than those considered in previous works. We show that in a broad region of the coupling constants the superconducting fluctuations still significantly reduce the conductivity leading to a negative magnetoresistance.

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