Insulating state of granular superconductors in a strong-coupling regime
Disordered Systems and Neural Networks
2007-05-23 v3 Superconductivity
Abstract
We analyze the possibility of the formation of a magnetic-field-induced insulating state in a two-dimensional granular superconductor with relatively strong intergranular coupling and show that such a state appears in a model with spatial variations of the single-grain critical magnetic field. This model describes realistic granular samples with the dispersion in grain sizes and explains the mechanism leading to a giant peak in the magnetoresistance.
Cite
@article{arxiv.cond-mat/0509386,
title = {Insulating state of granular superconductors in a strong-coupling regime},
author = {I. S. Beloborodov and Ya. V. Fominov and A. V. Lopatin and V. M. Vinokur},
journal= {arXiv preprint arXiv:cond-mat/0509386},
year = {2007}
}
Comments
6 pages, 3 figures. Version 3: extended, added discussion of experiment. Final version as published in PRB