Abstract:

It is well-known that electronic transport through quantum dot presents discrete peak structures in the conductance spectrum due to the resonant tunnelling. In contrast, the quantum interference between different Feynman paths in some multiple QD structures can result in a complete vanishing of the electron tunnelling, which is named as the antiresonance. We have recently studied the antiresonance phenomenon in the electron transport though three multiple QD structures, i.e. a QD chain, a QD ring and a double-QD chain. Some interesting results about the antiresonance are found, for example, the sudden resonance-antiresonance transition, the decoupling effect and a well-defined insulating band. These results are instructive for the potential device application. In this talk, I will show the details of our investigation on the antiresonance.
 
 
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