Charge Pumping in Mesoscopic Systems coupled to a Superconducting Lead
Mesoscale and Nanoscale Physics
2009-11-07 v1 Superconductivity
Abstract
We derive a general scattering-matrix formula for the pumped current through a mesoscopic region attached to a normal and a superconducting lead. As applications of this result we calculate the current pumped through (i) a pump in a wire, (ii) a quantum dot in the Coulomb blockade regime, and (iii) a ballistic double-barrier junction, all coupled to a superconducting lead. Andreev reflection is shown to enhance the pumped current by up to a factor of 4 in case of equal coupling to the leads. We find that this enhancement can still be further increased for slightly asymmetric coupling.
Keywords
Cite
@article{arxiv.cond-mat/0204340,
title = {Charge Pumping in Mesoscopic Systems coupled to a Superconducting Lead},
author = {M. Blaauboer},
journal= {arXiv preprint arXiv:cond-mat/0204340},
year = {2009}
}
Comments
5 pages, 2 figures