Fano effect in a few-electron quantum dot

Tomohiro Otsuka, Eisuke Abe, Shingo Katsumoto, Yasuhiro Iye, Gyong L. Khym, Kicheon Kang

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We have studied the Fano effect in a few-electron quantum dot side-coupled to a quantum wire. The conductance of the wire, which shows an ordinal staircase-like quantization without the dot, is modified through the interference (the Fano effect) and the charging effects. These effects are utilized to verify the exhaustion of electrons in the dot. The "addition energy spectrum" of the dot shows a shell structure, indicating that the electron confinement potential is fairly circular. A rapid sign inversion of the Fano parameter on the first conductance plateau with the change of the wire gate voltage has been observed, and explained by introducing a finite width of dot-wire coupling.

Original languageEnglish
Article number084706
Journaljournal of the physical society of japan
Volume76
Issue number8
DOIs
Publication statusPublished - 2007 Aug

Keywords

  • Charge detection
  • Fano effect
  • Quantum dot
  • Quantum wire
  • Shell structure

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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