We investigate the effect of Zeeman-splitting on quasiparticle transport in normal-superconducting-normal (NSN) aluminum single electron transistors (SETs). In the above-gap transport the interplay of Coulomb blockade and Zeeman-splitting leads to spin-dependence of the sequential tunneling. This creates regimes where either one or both spin species can tunnel onto or off the island. At lower biases, spin-dependence of the single quasiparticle state is studied and operation of the device as a bipolar spin filter is suggested.
@article{arxiv.cond-mat/0602576,
title = {Spin-Dependent Quasiparticle Transport in Aluminum Single Electron Transistors},
author = {A. J. Ferguson and S. E. Andresen and R. Brenner and R. G. Clark},
journal= {arXiv preprint arXiv:cond-mat/0602576},
year = {2009}
}