Interference Effect in Multi-level Transport through a Quantum Dot
介观与纳米尺度物理
2009-11-10 v2
摘要
We present experimental results and a model to solve the problem of "in-phase Coulomb peaks" observed in transport through a quantum dot. In a marginal region between Coulomb-blockade and open-dot, we have observed Fano-type interference through two energy levels inside the dot, which manifest themselves in two overlapped Coulomb-diamond-like structures in the excitation spectrum. One of the two levels is strongly coupled to the leads and the phase of traversing electrons is locked to it. We have detected the phase change at the vertices and the centers of the larger diamonds through the sign of the Fano's asymmetric parameters supporting the above deduction.
引用
@article{arxiv.cond-mat/0312431,
title = {Interference Effect in Multi-level Transport through a Quantum Dot},
author = {Hisashi Aikawa and Kensuke Kobayashi and Akira Sano and Shingo Katsumoto and Yasuhiro Iye},
journal= {arXiv preprint arXiv:cond-mat/0312431},
year = {2009}
}
备注
4 pages, 4 figures, to appear in J. Phys. Soc. Jpn. (December 15, 2004)