2006/02/09 by Andreas Fuhrer, A. Fuhrer, P. Brusheim +8 · 1 citation
Chemistry · Computer Science · Mathematics · Physics and Astronomy · #Chemistry #Coupling (piping) #Fano plane #Materials science #Mathematics #Optoelectronics #Physics #Quantum #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum optics and atomic interactions #Quantum-Dot Cellular Automata #Ring (chemistry) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.73.205326
published as Phys. Rev. B 73,205326 (2006) · 9 pages, 6 figures
arxiv created 2006/02/09 · openalex publication_date 2006/05/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Transport measurements are presented on a quantum ring that is tunnel-coupled to a quantum dot. When the dot is in the Coulomb blockade regime, but strongly coupled to the open ring, Fano line shapes are observed in the current through the ring, when the electron number in the dot changes by 1. The symmetry of the Fano resonances is found to depend on the magnetic flux penetrating the area of the ring and on the strength of the ring--dot coupling. At temperatures above T=0.65\phantom\rule0.3em0exK the Fano effect disappears, while the Aharonov-Bohm interference in the ring persists up to T=4.2\phantom\rule0.3em0exK. Good agreement is found between these experimental observations and a single-channel scattering matrix model including decoherence in the dot.