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