Superconducting fluctuations in granular metals with a large coupling between the grains
Abstract
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.
- Publication:
-
Physical Review B
- Pub Date:
- March 2002
- DOI:
- 10.1103/PhysRevB.65.094516
- arXiv:
- arXiv:cond-mat/0108104
- Bibcode:
- 2002PhRvB..65i4516S
- Keywords:
-
- 74.80.Bj;
- 74.40.+k;
- 72.15.Rn;
- 73.23.-b;
- Fluctuations;
- Localization effects;
- Electronic transport in mesoscopic systems;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 12 pages, 7 figures