Phys. Rev. B 65, 094516 (2002) [10 pages]Superconducting fluctuations in granular metals with a large coupling between the grainsReceived 6 August 2001; revised 5 October 2001; published 21 February 2002 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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.65.094516
DOI:
10.1103/PhysRevB.65.094516
PACS:
74.80.Bj, 74.40.+k, 72.15.Rn, 73.23.-b
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