Out-of-Equilibrium Kondo Effect in a Mesoscopic Device | Zendy

S. De Franceschi | Zendy; Ronald Hanson | Zendy; Wilfred G. van der Wiel | Zendy; J. M. Elzerman | Zendy; J. J. Wijpkema | Zendy; T. Fujisawa | Zendy; Seigo Tarucha | Zendy; Leo P. Kouwenhoven | Zendy

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Out-of-Equilibrium Kondo Effect in a Mesoscopic Device

Author(s) -

S. De Franceschi,

Ronald Hanson,

Wilfred G. van der Wiel,

J. M. Elzerman,

J. J. Wijpkema,

T. Fujisawa,

Seigo Tarucha,

Leo P. Kouwenhoven

Publication year - 2002

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.89.156801

Subject(s) - mesoscopic physics , kondo effect , condensed matter physics , physics , quantum dot , coupling (piping) , kondo insulator , non equilibrium thermodynamics , resonance (particle physics) , magnetic field , quantum mechanics , materials science , electrical resistivity and conductivity , metallurgy

We study the nonequilibrium 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.

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