We study the effect of electron hopping in triple quantum dots modelled bythe three-impurity Anderson model. We determine the range of hopping parameterswhere the system exhibits the two-channel Kondo effect and has non-Fermi-liquidproperties in a wide temperature interval. As this interval is entered fromabove, the conductance through the side dots increases to a half of theconductance quantum, while the conductance through the system remains small. Atlower temperatures the conductance through the system increases to the unitarylimit as the system crosses over to the Fermi-liquid ground state. Measuringthe differential conductance in a three terminal configuration provides anexperimental probe into the NFL behavior.
展开▼
