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

Toshihiro Kubo, Yasuhiro Tokura, Tsuyoshi Hatano, Seigo Tarucha

Research output: Contribution to journalArticle

44 Citations (Scopus)

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 ≠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.

Original languageEnglish
Article number205310
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number20
DOIs
Publication statusPublished - 2006 Nov 16

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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