Kondo effect out of equilibrium in a mesoscopic device
De Franceschi, S. · Hanson, R. · van der Wiel, W. G. · Elzerman, J. M. · Wijpkema, J. J. · Fujisawa, T. · Tarucha, S. · Kouwenhoven, L. P.
Original · EN
We study the non-equilibrium regime of the Kondo effect in a quantum dot laterally coupled to a narrow wire. We observe a split Kondo resonance when a finite bias voltage is imposed across the wire. The splitting is attributed to the creation of a double-step Fermi distribution function in the wire. Kondo correlations are strongly suppressed when the voltage across the wire exceeds the Kondo temperature. A perpendicular magnetic field enables us to selectively control the coupling between the dot and the two Fermi seas in the wire. Already at fields of order 0.1 T only the Kondo resonance associated with the strongly coupled reservoir survives.
English translation
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