Negative Magnetoresistance in Andreev Interferometers
Superconductivity
2009-11-07 v1 Mesoscale and Nanoscale Physics
Abstract
We consider transport in a diffusive cross-shaped Andreev interferometer geometry, both theoretically and experimentally. A strong and unexpected modulation of the conductance with the superconducting phase is found. In particular, a reversed resistance vs. phase difference is predicted, where the resistance is decreased by a phase gradient. A comparison of our quasiclassical calculation with experimental data shows quantitative agreement if we account for diamagnetic screening.
Cite
@article{arxiv.cond-mat/0203546,
title = {Negative Magnetoresistance in Andreev Interferometers},
author = {W. Belzig and R. Shaikaidarov and V. V. Petrashov and Yu. V. Nazarov},
journal= {arXiv preprint arXiv:cond-mat/0203546},
year = {2009}
}
Comments
4 pages, 4 figures, revtex4