Fermi-liquid versus non-Fermi-liquid behavior in triple quantum dots

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

References in corpus (7)

• Kondo effect in quantum dots
• Strongly correlated regimes in a double quantum-dot device
• Quantum criticality in a double quantum-dot system
• Quantum phase transition in a two-channel-Kondo quantum dot device
• Coulomb blockade and Non-Fermi-liquid behavior in quantum dots
• Two-channel Kondo tunneling in triple quantum dot
• Prediction of the capacitance lineshape in two-channel quantum dots

Cited by in corpus (8)

• The numerical renormalization group method for quantum impurity systems
• Quantum phase transitions in the systems of parallel quantum dots
• Numerical renormalization group study of two-channel three-impurity triangular clusters
• Kondo-Dicke resonances in electronic transport through triple quantum dots
• A Novel Approach to Study Highly Correlated Nanostructures: The Logarithmic Discretization Embedded Cluster Approximation
• Transport through quantum dots: A combined DMRG and cluster-embedding study
• Dicke-like effect in spin-polarized transport through coupled quantum dots
• Photon-assistant Fano resonance in coupled multiple quantum dots