Cyclic Depopulation of Edge States in a large Quantum Dot

Abstract

We investigate magneto-transport through a 1.6 μm wide quantum dot (QD) with adjacent charge detector, for different integer filling factors in the QD and constrictions. When this system is operated as a Fabry-Pérot interferometer, transport is governed by a Coulomb blockade mechanism. In the tunneling regime, we can directly measure the charge stability diagram of two capacitively and tunnel coupled Landau levels. This situation has been investigated in direct transport, as well as in single electron counting. The edge states within the dot are non-cyclically depopulated, which can be explained by a simple capacitive model and allows to draw conclusions about the edge state geometry within the quantum dot.

References in corpus (7)

• Non-Abelian Anyons and Topological Quantum Computation
• Single-shot read-out of an individual electron spin in a quantum dot
• Detecting Non-Abelian Statistics in the nu=5/2 Fractional Quantum Hall State
• Counting statistics and super-Poissonian noise in a quantum dot
• Quantum transport in electron Fabry-Perot interferometers
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• Multiple transitions of the spin configuration in quantum dots

Cited by in corpus (10)

• Aharonov-Bohm interference of fractional quantum Hall edge modes
• Flux superperiods and periodicity transitions in quantum Hall interferometers
• Interplay of fractional quantum Hall states and localization in quantum point contacts
• Observation of quantum Hall interferometer phase jumps due to changing quasiparticle number
• Resonant electron tunneling in a tip-controlled potential landscape
• Subperiods and apparent pairing in integer quantum Hall interferometers
• Electron-pairing in the quantum Hall regime due to neutralon exchange
• Transmission phase lapses through a quantum dot in a strong magnetic field
• Edge channel confinement in a bilayer graphene $n$-$p$-$n$ quantum dot
• Formation of spin droplet at nu = 5/2 in an asymmetric quantum dot under quantum Hall conditions