We theoretically investigate electron transport through an Aharonov-Bohm interferometer containing laterally coupled double quantum dots. We introduce the indirect coupling parameter α, which characterizes the strength of the coupling via the reservoirs between two quantum dots. α =1 indicates the strongest coupling, where only a single mode contributes to the transport in the system. Two conduction modes exist in a system where α ≠1. The interference effects such as the Fano resonance and the Aharonov-Bohm oscillation are suppressed as the absolute value of the parameter α decreases from 1. The linear conductance does not depend on the flux when α=0 since it corresponds to independent coupling of the dots to the reservoir modes.
|ジャーナル||Physical Review B - Condensed Matter and Materials Physics|
|出版ステータス||Published - 2006|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics