Fano-Kondo Interplay in a Side-Coupled Double Quantum Dot

2009/12/10 by Satoshi Sasaki, S. Sasaki, H. Tamura +4
Computer Science · Physics and Astronomy · #Condensed matter physics #Fano plane #Fano resonance #Hubbard model #Impurity #Interference (communication) #Kondo effect #Physics #Plasmon #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Resonance (particle physics) #Semiconductor Quantum Structures and Devices #Slave boson #Superconductivity #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.103.266806

4 pages, 4 figures

arxiv created 2009/12/10 · openalex publication_date 2009/12/30 · arxiv updated 2015/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate low-temperature transport characteristics of a side-coupled double quantum dot where only one of the dots is directly connected to the leads. We observe Fano resonances, which arise from interference between discrete levels in one dot and the Kondo effect, or cotunneling in general, in the other dot, playing the role of a continuum. The Kondo resonance is partially suppressed by destructive Fano interference, reflecting novel Fano-Kondo competition. We also present a theoretical calculation based on the tight-binding model with the slave boson mean field approximation, which qualitatively reproduces the experimental findings.

Citations

• Coulomb-Modified Fano Resonance in a One-Lead Quantum Dot
• Two-stage Kondo effect in side-coupled quantum dots: Renormalized perturbative scaling theory and numerical renormalization group analysis
• Fano resonance in a quantum wire with a side-coupled quantum dot
• Resistance Minimum in Dilute Magnetic Alloys
• Effects of Configuration Interaction on Intensities and Phase Shifts
• Interference Effect in Multilevel Transport through a Quantum Dot