Transmission phase of a singly occupied quantum dot in the Kondo regime

Abstract

We report on the phase measurements on a quantum dot containing a single electron in the Kondo regime. Transport takes place through a single orbital state. Although the conductance is far from the unitary limit, we measure for the first time, a transmission phase as theoretically predicted of π/2. As the dot's coupling to the leads is decreased, with the dot entering the Coulomb blockade regime, the phase reaches a value of π. Temperature shows little effect on the phase behaviour in the range 30--600 mK, even though both the two-terminal conductance and amplitude of the Aharonov-Bohm oscillations are strongly affected. These results confirm that previous phase measurements involved transport through more than a single level.

arXiv comment4 pages, 5 figures

References in corpus (16)

• Spins in few-electron quantum dots
• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• Low Temperature Transport through a Quantum Dot: The Anderson Model out of Equilibrium
• From the Kondo Regime to the Mixed-Valence Regime in a Single-Electron Transistor
• The Addition Spectrum of a Lateral Dot from Coulomb and Spin Blockade Spectroscopy
• Kondo effect in quantum dots
• Phase Evolution in a Kondo Correlated System
• Crossover from mesoscopic to universal phase for electron transmission in quantum dots
• Observation of the Fano-Kondo Anti-Resonance in a Quantum Wire with a Side-Coupled Quantum Dot
• Phase coherent transmission through interacting mesoscopic systems
• Transmission Phase of a Quantum Dot with Kondo Correlation Near the Unitary Limit
• Transmission Phase Shift of a Quantum Dot with Kondo Correlations
• Aharonov-Bohm Interferometry with Interacting Quantum Dots: Spin Configurations, Asymmetric Interference Patterns, Bias-Voltage-Induced Aharonov-Bohm Oscillations, and Symmetries of Transport Coefficients
• Charge Distribution in a Kondo Correlated Quantum Dot
• The Enhanced Sensitivity of the Transmission Phase of a Quantum Dot to Kondo Correlations

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• Realization of SU(N) Kondo effect in strong magnetic field
• Engineering the Kondo and Fano effects in double quantum dots
• Electron phase shift at the zero-bias anomaly of quantum point contacts
• Phase shifts and phase $\pi$-jumps in four-terminal waveguide Aharonov-Bohm interferometers
• The Influence of Interference on the Kondo Effect in a Quantum Dot
• Abrupt disappearance and reemergence of the SU(2) and SU(4) Kondo effects due to population inversion
• Interplay of mesoscopic and Kondo effects for transmission amplitude of few-level quantum dots
• Thermoelectric Scanning Gate Interferometry on a Quantum Point Contact
• Transmission phase lapse in the non-Hermitian Aharonov-Bohm interferometer near the spectral singularity
• Transmission phase shifts of Kondo impurities
• Low-temperature behavior of transmission phase shift across a Kondo correlated quantum dot
• Analyzing the measured phase in the multichannel Aharonov-Bohm interferometer
• How to Measure the Transmission Phase via a Quantum Dot in a Two-Terminal Interferometer
• Fano-Kondo resonance versus Kondo plateau in an Aharonov-Bohm ring with an embedded quantum dot
• Exchange and correlation effects in the transmission phase through a few-electron quantum dot
• Kondo induced π-phase shift of microwave photons in a circuit quantum electrodynamics architecture
• Spin selective transport through Aharonov-Bohm and Aharonov-Casher triple quantum dot systems
• Non-local coupling of two donor-bound electrons
• Conductance of closed and open long Aharonov-Bohm-Kondo rings
• Time-dependent wave packet simulations of transport through Aharanov-Bohm rings with an embedded quantum dot
• Kondo effect in transport through Aharonov-Bohm and Aharonov-Casher interferometers
• Coulomb-modified Fano interference in a double quantum dot Aharonov-Bohm ring
• Level occupation switching with density functional theory
• Effective tuning methods for few-electron regime in gate-defined quantum dots
• Transmission phase evolution in fully screened and overscreened Kondo impurities