Enhancement of parametric pumping due to Andreev reflection
Condensed Matter
2009-11-07 v1
Abstract
We report properties of parametric electron pumping in the presence of a superconducting lead. Due to a constructive interference between the direct reflection and the multiple Andreev reflection, the pumped current is greatly enhanced. For both quantum point contacts and double barrier structures at resonance, we obtain exact solutions in the weak pumping regime showing that , which should be compared with the result of conductance . Numerical results are also provided for the strong pumping regime showing interesting Andreev assisted pumping behaviour.
Keywords
Cite
@article{arxiv.cond-mat/0107077,
title = {Enhancement of parametric pumping due to Andreev reflection},
author = {Jian Wang and Yadong Wei and Baigeng Wang and Hong Guo},
journal= {arXiv preprint arXiv:cond-mat/0107077},
year = {2009}
}