Observation of the Fano-Kondo Antiresonance in a Quantum Wire with a Side-Coupled Quantum Dot

2004/10/31 by Masahiro Sato, Hisashi Aikawa, Kensuke Kobayashi +2 · 1 citation
Computer Science · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #Quantum-Dot Cellular Automata #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.95.066801

4 pages, 4 figures

arxiv created 2005/06/16 · openalex publication_date 2005/08/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We have observed the Fano-Kondo antiresonance in a quantum wire with a side-coupled quantum dot. In a weak coupling regime, dips due to the Fano effect appeared. As the coupling strength increased, conductance in the regions between the dips decreased alternately. From the temperature dependence and the response to the magnetic field, we conclude that the conductance reduction is due to the Fano-Kondo antiresonance. At a Kondo valley with the Fano parameter q approximately 0, the phase shift is locked to pi/2 against the gate voltage when the system is close to the unitary limit in agreement with theoretical predictions by Gerland et al. [Phys. Rev. Lett. 84, 3710 (2000)].

Citations

• Phase Evolution in a Kondo-Correlated System
• Transport Coefficients of the Anderson Model via the Numerical Renormalization Group
• Kondo screening cloud effects in mesoscopic devices
• Kondo resonances and Fano antiresonances in transport through quantum dots
• Fano resonance in a quantum wire with a side-coupled quantum dot
• Effects of Configuration Interaction on Intensities and Phase Shifts

Cited by

• Coherent switching by detuning a side-coupled quantum-dot system