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Spin-Dependent Quasiparticle Transport in Aluminum Single Electron Transistors

A. J. Ferguson·S. E. Andresen·R. Brenner·R. G. Clark
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Abstract

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.

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A. J. Ferguson, S. E. Andresen, R. Brenner, R. G. Clark. 2006-07-28. Spin-Dependent Quasiparticle Transport in Aluminum Single Electron Transistors. https://doi.org/10.1103/physrevlett.97.086602

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