Interplay between electrostatic and tunnel couplings in an independently contacted double quantum dot–quantum wire coupled device
✍ Scribed by S. Sasaki; H. Tamura; S. Miyashita; T. Maruyama; T. Akazaki; Y. Hirayama; H. Takayanagi
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 210 KB
- Volume
- 40
- Category
- Article
- ISSN
- 1386-9477
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✦ Synopsis
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.