Coulomb-modified Fano resonance in a one-lead quantum dot |
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Authors: | Johnson A C Marcus C M Hanson M P Gossard A C |
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Affiliation: | Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA. |
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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 up to 100. Where these effects coexist, line shapes 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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