Ghost Fano resonance in a double quantum dot molecule attached to leads

Details Ghost Fano resonance in a double quantum dot molecule attached to leads Ghost Fano resonance in a double quantum dot molecule attached to leads

2003-02-07

arxiv.org/abs/cond-mat/0302154v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures

Scientific paper

We study the electronic transport through a double quantum dot molecule attached to leads, and examine the transition from a configuration in series to a symmetrical parallel geometry. We find that a progressive reduction of the tunneling through the antibonding state takes place as a result of the destructive quantum interference between the different pathways through the molecule. The Fano resonance narrows down, disappearing entirely when the configuration is totally symmetric, so that only the bonding state participates of the transmission. In this limit the antibonding state becomes completely localized.

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