title: Ferromagnetic proximity effect in a ferromagnet-quantum-dot-superconductor device.
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.
authors.affiliation: Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
authors.forename: L
authors.initials: L
authors.lastname: Hofstetter
authors.forename: A
authors.initials: A
authors.lastname: Geresdi
authors.forename: M
authors.initials: M
authors.lastname: Aagesen
authors.forename: J
authors.initials: J
authors.lastname: Nygård
authors.forename: C
authors.initials: C
authors.lastname: Schönenberger
authors.forename: S
authors.initials: S
authors.lastname: Csonka