Fermi-liquid versus non-Fermi-liquid behavior in triple quantum dots
arXiv:cond-mat/0606287 · doi:10.1103/PhysRevLett.98.047203
Abstract
We study the effect of electron hopping in triple quantum dots modelled by the three-impurity Anderson model. We determine the range of hopping parameters where the system exhibits the two-channel Kondo effect and has non-Fermi-liquid properties in a wide temperature interval. As this interval is entered from above, the conductance through the side dots increases to a half of the conductance quantum, while the conductance through the system remains small. At lower temperatures the conductance through the system increases to the unitary limit as the system crosses over to the Fermi-liquid ground state. Measuring the differential conductance in a three terminal configuration provides an experimental probe into the NFL behavior.
4 pages, 5 figures
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- Numerical renormalization group study of two-channel three-impurity triangular clusters
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- Two-channel Kondo physics in odd impurity chains
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- Theory of electronic properties and quantum spin blockade in a gated linear triple quantum dot with one electron spin each
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- Kondo screening in high-spin side-coupled two-impurity clusters
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- Photon-assistant Fano resonance in coupled multiple quantum dots
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