Giant Fluctuations of Coulomb Drag in a Bilayer System
Mesoscale and Nanoscale Physics
2007-05-23 v1 Disordered Systems and Neural Networks
Materials Science
Abstract
We have observed reproducible fluctuations of the Coulomb drag, both as a function of magnetic field and electron concentration, which are a manifestation of quantum interference of electrons in the layers. At low temperatures the fluctuations exceed the average drag, giving rise to random changes of the sign of the drag. The fluctuations are found to be much larger than previously expected, and we propose a model which explains their enhancement by considering fluctuations of local electron properties.
Keywords
Cite
@article{arxiv.0704.1242,
title = {Giant Fluctuations of Coulomb Drag in a Bilayer System},
author = {A. S. Price and A. K. Savchenko and B. N. Narozhny and G. Allison and D. A. Ritchie},
journal= {arXiv preprint arXiv:0704.1242},
year = {2007}
}
Comments
10 pages, 4 figures