Fano resonance in a quantum wire with a side-coupled quantum dot

2003/11/30 by Kensuke Kobayashi, Hisashi Aikawa, Akira Sano +2 · 8 citations
Engineering · Physics and Astronomy · #Molecular Junctions and Nanostructures #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.70.035319

published as Physical Review B 70, 035319 (2004) · REVTEX, 6 pages including 5 figures, final version

openalex publication_date 2004/07/27 · arxiv created 2004/08/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report a transport experiment on the Fano effect in a quantum connecting wire with a side-coupled quantum dot (QD). The Fano resonance occurs between the QD and the ``T-shaped'' junction in the wire, and the transport detects antiresonance or a forward-scattered part of the wave function. While it is more difficult to tune the shape of the resonance in this geometry than in the previously reported Aharonov-Bohm-ring-type interferometer, the resonance purely consists of the coherent part of transport. Utilizing this advantage, we have quantitatively analyzed the temperature dependence of the Fano effect by including the thermal broadening and the decoherence. We have also proven that this geometry can be a useful interferometer for measuring the phase evolution of electrons at a QD.

Citations

• Phase Evolution in a Kondo-Correlated System
• Kondo resonances and Fano antiresonances in transport through quantum dots
• Effects of Configuration Interaction on Intensities and Phase Shifts

Cited by

• Tunable Kondo screening in a quantum dot device
• Observation of the Fano-Kondo Antiresonance in a Quantum Wire with a Side-Coupled Quantum Dot
• Theory of Fano–Kondo Effect of Transport Properties through Quantum Dots
• STM tunneling through a quantum wire with a side-attached impurity
• Fano resonance in electron transport through parallel double quantum dots in the Kondo regime
• Fano–Rashba effect in quantum dots
• Coherent switching by detuning a side-coupled quantum-dot system
• Universal zero-bias conductance through a quantum wire side-coupled to a quantum dot