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Electron transport through Aharonov-Bohm interferometer with laterally coupled double quantum dots

Toshihiro Kubo·Yasuhiro Tokura·Tsuyoshi Hatano·Seigo Tarucha
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Abstract

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 $|α|\neq 1$. 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.

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Toshihiro Kubo, Yasuhiro Tokura, Tsuyoshi Hatano, Seigo Tarucha. 2006-07-03. Electron transport through Aharonov-Bohm interferometer with laterally coupled double quantum dots. https://doi.org/10.1103/physrevb.74.205310

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