Ferromagnetic Proximity Effect in a Ferromagnet–Quantum-Dot–Superconductor Device

2009/10/31 by L. Hofstetter, Attila Geresdi, S. Csonka +8 · 3 citations
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.104.246804

published as Phys. Rev. Lett. 104, 246804 (2010) · 5 pages, 4 figures

openalex publication_date 2010/06/18 · arxiv created 2010/11/02 · arxiv updated 2010/11/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The ferromagnetic proximity effect is studied in InAs nanowire based quantum dots strongly coupled to a ferromagnetic (F) and a superconducting (S) lead. The influence of the F lead is detected through the splitting of the spin-1/2 Kondo resonance. We show that the F lead induces a local exchange field on the quantum dot, which has varying amplitude and sign depending on the charge states. The interplay of the F and S correlations generates an exchange field related subgap feature.

Citations

• Controlling spin in an electronic interferometer with spin-active interfaces
• Evidence for Crossed Andreev Reflection in Superconductor-Ferromagnet Hybrid Structures

Cited by

• Transient dynamics and steady state behavior of the Anderson–Holstein model with a superconducting lead
• Spin-polarized Andreev transport influenced by Coulomb repulsion through a two-quantum-dot system
• Detection of spin bias in a four-terminal quantum-dot ring