Kondo effect out of equilibrium in a mesoscopic device
  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. 
S. De Franceschi, R. Hanson, W. G. van der Wiel, J. M. Elzerman, J. J.   Wijpkema, T. Fujisawa, S. Tarucha, and L. P. Kouwen...