Interaction-induced interference in the integer quantum Hall effect

Abstract

In recent interference experiments with an electronic Fabry-Perot interferometer (FPI), implemented in the integer quantum Hall effect regime, a flux periodicity of $h/2e$ was observed at bulk fillings ${\nu }_B>2.5$. The halved periodicity was accompanied by an interfering charge $e^{\ast }=2e$, determined by shot noise measurements. Here, we present measurements, demonstrating that, counterintuitively, the coherence and the interference periodicity of the interfering chiral edge channel are solely determined by the coherence and the enclosed flux of the adjacent edge channel. Our results elucidate the important role of the latter and suggest that a neutral chiral edge mode plays a crucial role in the pairing phenomenon. Our findings reveal that the observed pairing of electrons is not a curious isolated phenomenon, but one of many manifestations of unexpected edge physics in the quantum Hall effect regime.

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Cited by in corpus (19)

• Aharonov-Bohm interference of fractional quantum Hall edge modes
• Fractional charge and fractional statistics in the quantum Hall effects
• Melting of interference in the fractional quantum Hall effect: Appearance of neutral modes
• Impact of bulk-edge coupling on observation of anyonic braiding statistics in quantum Hall interferometers
• Anyons in Quantum Hall Interferometry
• Edge Probes of Topological Order
• Strongly coupled edge states in a graphene quantum Hall interferometer
• Graphene-based quantum Hall interferometer with self-aligned side gates
• Observation of quantum Hall interferometer phase jumps due to changing quasiparticle number
• Fractional Coulomb blockade for quasiparticle tunneling between edge channels
• Subperiods and apparent pairing in integer quantum Hall interferometers
• Electron Pairing of Interfering Interface-Based Edge Modes
• Correlated double-electron additions at the edge of a two-dimensional electronic system
• Anyonic braiding via quench dynamics in fractional quantum Hall liquids
• Evidence for correlated electron pairs and triplets in quantum Hall interferometers
• Anomalous Aharonov-Bohm Interference in the Presence of Edge Reconstruction
• Electron-pairing in the quantum Hall regime due to neutralon exchange
• Quantum Hall interferometry at finite bias with multiple edge channels
• Single electron interference and capacitive edge mode coupling generates ${\Phi }_0/2$ flux periodicity in Fabry-Perot interferometers