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arXiv · 0910.3237

Ferromagnetic proximity effect in F-QDot-S device

L. Hofstetter·S. Csonka·A. Geresdi·M. Aagesen·J. Nygard·C. Schonenberger
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Abstract

Ferromagnetic proximity effect is studied in InAs nanowire (NW) based quantum dots (QD) 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 QD, which has varying amplitude and a sign depending on the charge states. The interplay of the F and S correlations generates an exchange field related supgap feature. This novel mini-gap allows now the visualization of the exchange field also in even charge states

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L. Hofstetter, S. Csonka, A. Geresdi, M. Aagesen, J. Nygard, C. Schonenberger. 2010-11-02. Ferromagnetic proximity effect in F-QDot-S device. https://doi.org/10.1103/physrevlett.104.246804

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