The Influence of Interference on the Kondo Effect in a Quantum Dot

Abstract

We study the Kondo effect in a model system of a quantum dot embedded in an Aharanov-Bohm ring connected to two leads. By transforming to the scattering basis of the direct inter-lead tunneling, we are able to describe precisely how the Kondo screening of the dot spin occurs. We calculate the Kondo temperature and zero-temperature conductance and find that both are influenced by the Aharanov-Bohm ring as well as the electron density in the leads. We also calculate the form of an additional potential scattering term that arises at low energies due to the breaking of particle-hole symmetry. Many of our results are supported by numerical analysis using the numerical renormalization group.

24 pages, 18 figures

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Cited by in corpus (10)

• Dynamics of coherences in the interacting double-dot Aharonov-Bohm interferometer: Exact numerical simulations
• Crossover in the two-impurity Kondo model induced by direct charge tunneling
• Scaling analysis of Kondo screening cloud in a mesoscopic ring with an embedded quantum dot
• Transmission phase shifts of Kondo impurities
• A review on Aharonov-Bohm quantum machines: Thermoelectric heat engines and diodes
• Kondo effect due to a hydrogen impurity in graphene: a multichannel Kondo problem with diverging hybridization
• Interaction effects in Aharonov-Bohm-Kondo Rings
• Fano-Kondo resonance versus Kondo plateau in an Aharonov-Bohm ring with an embedded quantum dot
• Conductance of closed and open long Aharonov-Bohm-Kondo rings
• Impurity entropy of junctions of multiple quantum wires