2003/12/31 by Hisashi Aikawa, Kensuke Kobayashi, Akira Sano +2 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Channel (broadcasting) #Condensed matter physics #Coulomb #Coulomb blockade #Electron #Excitation #Fano plane #Graphene research and applications #Interference (communication) #Phase (matter) #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Semiconductor materials and devices #cond-mat.mes-hall
paper · pdf · doi:10.1143/jpsj.73.3235
published as Journal of the Physical Society of Japan 73, 3235-3238 (2004). · 4 pages, 4 figures, to appear in J. Phys. Soc. Jpn. (December 15, 2004)
arxiv created 2004/10/04 · openalex publication_date 2004/12/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.