Interplay between electrostatic and tunnel couplings in an independently contacted double quantum dot-quantum wire coupled device

S. Sasaki, H. Tamura, S. Miyashita, T. Maruyama, T. Akazaki, Y. Hirayama, H. Takayanagi

Research output: Contribution to journalArticle

Abstract

We have studied low temperature transport characteristics of an independently contacted double quantum dot-quantum wire coupled system. Each quantum dot is connected to three leads; source, drain and wire. Fano resonances associated with one dot appear in the conductance of the other dot, which are gradually suppressed as the inter-dot tunnel coupling via the wire is reduced. When the dot-wire tunnel coupling is lost, conductance modulation similar to the Fano resonances reappear, which is ascribed to purely inter-dot electrostatic coupling effect.

Original languageEnglish
Pages (from-to)1292-1294
Number of pages3
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume40
Issue number5
DOIs
Publication statusPublished - 2008 Mar 1

Keywords

  • Kondo effect
  • Quantum dot
  • RKKY interaction
  • Spin

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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