2007/01/31 by Tomohiro Otsuka, Eisuke Abe, Shingo Katsumoto +4 · 1 citation
Chemistry · Engineering · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Conductance #Conductance quantum #Electron #Fano plane #Molecular Junctions and Nanostructures #Quantization (signal processing) #Quantum and electron transport phenomena #Quantum dot #Quantum point contact #Quantum wire #cond-mat.mes-hall
paper · pdf · doi:10.1143/jpsj.76.084706
published as J. Phys. Soc. Jpn. 76, 084706 (2007) · 11 pages, 7 figures
arxiv created 2007/04/25 · openalex publication_date 2007/07/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.