Phase Evolution in a Kondo-Correlated System

2000/07/26 by Yang Ji, Moty Heiblum, M. Heiblum +4 · 15 citations
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1126/science.290.5492.779

published as science, 290, 779 (2000) · 4 pages, 4 figures. typos corrected. Changed to APS PRL style

arxiv created 2000/07/26 · openalex publication_date 2000/10/27 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We measured the phase evolution of electrons as they traverse a quantum dot (QD) formed in a two-dimensional electron gas that serves as a localized spin. The traversal phase, determined by embedding the QD in a double path electron interferometer and measuring the quantum interference of the electron wave functions manifested by conductance oscillation as a function of a weak magnetic field, evolved by pi radians, a range twice as large as theoretically predicted. As the correlation weakened, a gradual transition to the familiar phase evolution of a QD was observed. The specific phase evolution observed is highly sensitive to the onset of Kondo correlation, possibly serving as an alternative fingerprint of the Kondo effect.

Citations

• Low Temperature Transport through a Quantum Dot: The Anderson Model out of Equilibrium
• A ?fermi-liquid? description of the Kondo problem at low temperatures

Cited by

• Kondo effect and Josephson current through a quantum dot between two superconductors
• Kondo screening cloud effects in mesoscopic devices
• Anomalous transmission phase of a Kondo-correlated quantum dot
• Fano resonance in a quantum wire with a side-coupled quantum dot
• Minimal realization of the orbital Kondo effect in a quantum dot with two leads
• Spin-fluctuation-induced dephasing in a mesoscopic ring
• Beating of Aharonov-Bohm oscillations in a closed-loop interferometer
• Observation of the Fano-Kondo Antiresonance in a Quantum Wire with a Side-Coupled Quantum Dot
• Aharonov-Bohm physics with spin. I. Geometric phases in one-dimensional ballistic rings
• Photon-assisted electron transport through a three-terminal quantum dot system with nonresonant tunneling channels
• An electronic Mach–Zehnder interferometer
• Fano resonance in electron transport through parallel double quantum dots in the Kondo regime
• Measuring the Transmission Phase of a Quantum Dot in a Closed Interferometer
• Effects of external radiation on biased Aharonov-Bohm rings
• Flux-dependent level attraction in double-dot Aharonov-Bohm interferometers