Kondo Effect in a Quantum Antidot

Abstract

We report Kondo-like behaviour in a quantum antidot (a submicron depleted region in a two-dimensional electron gas) in the quantum-Hall regime. When both spin branches of the lowest Landau level encircle the antidot in a magnetic field ($\sim 1$ T), extra resonances occur between extended edge states via antidot bound states when tunnelling is Coulomb blockaded. These resonances appear only in alternating Coulomb-blockaded regions, and become suppressed when the temperature or source-drain bias is raised. Although the exact mechanism is unknown, we believe that Kondo-like correlated tunnelling arises from skyrmion-type edge reconstruction. This observation demonstrates the generality of the Kondo phenomenon.

9 pages, 3 figures (Fig.3 in colour), to appear in Phys. Rev. Lett

References in corpus (7)

• 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
• The Kondo Effect in the Unitary Limit
• Detection of Coulomb Charging around an Antidot in the Quantum Hall Regime
• Coulomb blockade of tunnelling through compressible rings formed around an antidot: an explanation for $h/2e$ Aharonov-Bohm oscillations
• Kondo effect in multielectron quantum dots at high magnetic fields

Cited by in corpus (23)

• Kondo effect in quantum dots
• Coulomb Oscillations in Antidots in the Integer and Fractional Quantum Hall Regimes
• Electron interactions in an antidot in the integer quantum Hall regime
• Coulomb Blockade and Kondo Effect in a Quantum Hall Antidot
• Non-linear charge and energy dynamics of an adiabatically driven interacting quantum dot
• Double point contact in Quantum Hall Line Junctions
• The quenching of compressible edge states around antidots
• Hole maximum density droplets of an antidot in strong magnetic fields
• Microscopic metallic air-bridge arrays for connecting quantum devices
• Spectator Behavior in a Quantum Hall Antidot with Multiple Bound Modes
• Comment on "Absence of Compressible Edge Channel Rings in Quantum Antidots"
• Time-dependent magnetotransport of a wave packet in a quantum wire with embedded quantum dots
• Temperature-dependent screening of the edge state around antidots in the quantum Hall regime
• Transport of fractional Hall quasiparticles through an antidot
• Kondo effect in nanostructures
• Capacitive interaction model for Aharonov-Bohm effects of a quantum Hall antidot
• Orbital Kondo effect in fractional quantum Hall systems
• Spin-Resolved Edge States around an Antidot in the Vicinity of the $\nu =2$ Quantum Hall State
• Kondo Effect in Mesoscopic Quantum Dots
• Transport in quantum spin Hall edges in contact to a quantum dot
• Observation of Collective Coulomb Blockade in a Gate-controlled Linear Quantum-dot Array
• Energy spectrum of a 2D Dirac oscillator in the presence of a constant magnetic field and an antidot potential
• Geometric Suppression of Single-Particle Energy Spacings in Quantum Antidots