Andreev magnetotransport in low-dimensional proximity structures: Spin-dependent conductance enhancement

Details Andreev magnetotransport in low-dimensional proximity structures: Spin-dependent conductance enhancement Andreev magnetotransport in low-dimensional proximity structures: Spin-dependent conductance enhancement

2004-11-16

arxiv.org/abs/cond-mat/0411412v1

Phys. Rev. B 71, 094517 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevB.71.094517

We study the excess conductance due to the superconducting proximity effect in a ballistic two-dimensional electron system subject to an in-plane magnetic field. We show that under certain conditions the interplay of the Zeeman spin splitting and the effect of a screening supercurrent gives rise to a spin-selective Andreev enhancement of the conductance and anomalies in its voltage, temperature and magnetic field characteristics. The magnetic-field influence on Andreev reflection is discussed in the context of using superconducting hybrid junctions for spin detection.

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