The Enhanced Sensitivity of the Transmission Phase of a Quantum Dot to Kondo Correlations

Abstract

The strong sensitivity of the transmission phase through a quantum dot embedded into one arm of a two-wave Aharonov-Bohm interferometer to the Kondo effect is explained. The enhancement takes place because of the buildup of the exchange scattering on the dot due to Kondo correlations even much above $T_K$. The enhanced exchange competes with the potential scattering, which is always weak. Both cases of the Anderson impurity model and a multilevel quantum dot are considered. In the latter case in addition to the description of peculiar phase behavior a mechanism leading to ferromagnetic Kondo coupling in quantum dots is proposed.

4 pages, 2 figures

References in corpus (4)

• Kondo effect in real quantum dots
• Transmission Phase of a Quantum Dot with Kondo Correlation Near the Unitary Limit
• Charge Distribution in a Kondo Correlated Quantum Dot
• Broken unitarity and phase measurements in Aharonov-Bohm interferometers

Cited by in corpus (17)

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• Transmission phase of a singly occupied quantum dot in the Kondo regime
• Persistent currents through a quantum impurity: Protection through integrability
• Correlation-induced resonances and population switching in a quantum dot coulomb valley
• Measuring the Kondo effect in the Aharonov-Bohm interferometer
• Level-occupation switching of the Quantum Dot, and phase anomalies in mesoscopic interferometry
• Phase lapses in scattering through multi-electron quantum dots: Mean-field and few-particle regimes
• Spin-dependent transport through quantum-dot Aharonov-Bohm interferometers
• Interplay of mesoscopic and Kondo effects for transmission amplitude of few-level quantum dots
• Crossing of two Coulomb-Blockade Resonances
• Transmission zero in a quantum dot with strong electron-electron interaction: Perturbative conductance calculations
• Low-temperature behavior of transmission phase shift across a Kondo correlated quantum dot
• Transport properties of a molecule embedded in an Aharonov-Bohm interferometer
• Fano-Kondo resonance versus Kondo plateau in an Aharonov-Bohm ring with an embedded quantum dot
• Anomalous Transmission Phase of a Kondo-Correlated Quantum Dot
• Conductance Phases in Aharonov-Bohm Ring Quantum Dots
• Conductance of closed and open long Aharonov-Bohm-Kondo rings