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

2004/11/16 by G. Tkachov, Grygoriy Tkachov, Klaus Richter
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.71.094517

published as Phys. Rev. B 71, 094517 (2005) · 4 pages, 5 figures

arxiv created 2004/11/16 · openalex publication_date 2005/03/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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.

Citations

• Angle dependence of Andreev scattering at semiconductor–superconductor interfaces
• Quantum Andreev Map: A Paradigm of Quantum Chaos in Superconductivity

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