Abstract
Motivated by recent experiments, we consider a single-electron transistor in the Kondo regime which is coupled to three leads in the presence of large bias voltages. Such a steady-state nonequilibrium system is to a large extent governed by a decoherence rate induced by the current through the dot. As the two-terminal conductance turns out to be rather insensitive to , we study the conductance in a three-terminal device using a perturbative renormalization group method and calculate the characteristic splitting of the Kondo resonance. The interplay between potential biases and anisotropy in coupling to the three leads determines and the conditions for strong coupling.
- Received 7 December 2005
DOI:https://doi.org/10.1103/PhysRevB.73.081309
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