Fano Effect in a Few-Electron Quantum Dot
Mesoscale and Nanoscale Physics
2009-11-13 v2
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.
Cite
@article{arxiv.cond-mat/0701023,
title = {Fano Effect in a Few-Electron Quantum Dot},
author = {Tomohiro Otsuka and Eisuke Abe and Shingo Katsumoto and Yasuhiro Iye and Gyong Luck Khym and Kicheon Kang},
journal= {arXiv preprint arXiv:cond-mat/0701023},
year = {2009}
}
Comments
11 pages, 7 figures