Tkachov, Grygoriy and Richter, Klaus
Andreev magnetotransport in low-dimensional proximity structures: Spin-dependent conductance enhancement.
Physical Review B 71, 094517-1-094517-4.
Other URL: http://link.aps.org/doi/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.