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Coulomb-Modified Fano Resonance in a One-Lead Quantum Dot

A. C. Johnson·C. M. Marcus·M. P. Hanson·A. C. Gossard
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Abstract

We investigate a tunable Fano interferometer consisting of a quantum dot coupled via tunneling to a one-dimensional channel. In addition to Fano resonance, the channel shows strong Coulomb response to the dot, with a single electron modulating channel conductance by factors of up to 100. Where these effects coexist, lineshapes with up to four extrema are found. A model of Coulomb-modified Fano resonance is developed and gives excellent agreement with experiment.

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A. C. Johnson, C. M. Marcus, M. P. Hanson, A. C. Gossard. 2004-02-07. Coulomb-Modified Fano Resonance in a One-Lead Quantum Dot. https://doi.org/10.1103/physrevlett.93.106803

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