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

Grygoriy Tkachov and Klaus Richter
Phys. Rev. B 71, 094517 – Published 30 March 2005

Abstract

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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  • Received 16 November 2004

DOI:https://doi.org/10.1103/PhysRevB.71.094517

©2005 American Physical Society

Authors & Affiliations

Grygoriy Tkachov and Klaus Richter

  • Institute for Theoretical Physics, Regensburg University, 93040 Regensburg, Germany

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Issue

Vol. 71, Iss. 9 — 1 March 2005

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