We show that the low frequency microwave absorption of an ensemble of small metallic grains at low temperatures is dominated by a mesoscopic relaxation mechanism. Giant positive magnetoresistance and very strong temperature dependence of the microwave conductivity is predicted.
@article{arxiv.cond-mat/9508057,
title = {Giant Microwave Absorption in Metallic Grains: Relaxation Mechanism},
author = {F. Zhou and B. Spivak and N. Taniguchi and B. L. Altshuler},
journal= {arXiv preprint arXiv:cond-mat/9508057},
year = {2009}
}