Separately contacted edge states: A new spectroscopic tool for the investigation of the quantum Hall effect

Abstract

Using an innovative combination of a quasi-Corbino sample geometry and the cross-gate technique, we have developed a method that enables us to separately contact single edge channels in the quantum Hall regime and investigate equilibration among them. Performing 4-point resistance measurements, we directly obtain information on the energetic and geometric structure of the edge region and the equilibration-length for current transport across the Landau- as well as the spin-gap. Based on an almost free choice in the number of participating edge channels and their interaction-length a systematic investigation of the parameter-space becomes possible.

8 pages, 7 figures

Cited by in corpus (34)

• Partial equilibration of integer and fractional edge channels in the thermal quantum Hall effect
• Partial equilibration of anti-Pfaffian edge modes at $\nu =5/2$
• Spatially-resolved analysis of edge-channel equilibration in quantum Hall circuits
• Observation of two relaxation mechanisms in transport between spin split edge states at high imbalance
• Multi-channel architecture for electronic quantum-Hall interferometry
• Experimental realization of a Fabry-Perot-type interferometer by co-propagating edge states in the quantum Hall regime
• Charge equilibration in integer and fractional quantum Hall edge channels in a generalized Hall-bar device
• Conductance oscillations in strongly correlated fractional quantum Hall line junctions
• Quantum Hall Effect in a Two-Dimensional Electron System Bent by 90 Degrees
• Electrical read-out of the local nuclear polarization in the quantum Hall effect
• Energy transport by neutral collective excitations at the quantum Hall edge
• Transport in line junctions of $\nu =5/2$ quantum Hall liquids
• Spin-dependent transport through a Weyl semimetal surface
• Equilibration between edge states in the fractional quantum Hall effect regime at high imbalances
• Edge magnetotransport in graphene: A combined analytical and numerical study
• Magnetic field dependent equilibration of fractional quantum Hall edge modes
• Resistively-detected NMR lineshapes in a quasi-one dimensional electron system
• Separately contacted edge states at high imbalance in the integer and fractional quantum Hall effect regime
• Topological defects in the edge state structure in a bilayer electron system
• Impact of electron heating on the equilibration between quantum Hall edge channels
• Interference effects in transport across a single incompressible strip at the edge of the fractional quantum Hall system
• Energy spectrum reconstruction at the edge of a two-dimensional electron system with strong spin-orbit coupling
• Spin ordering: two different scenarios for the single and double layer structures in the fractional and integer quantum Hall effect regimes
• Incidence of the boundary shape in the effective theory of fractional quantum Hall edges
• Landau level spin diode in a GaAs two dimensional hole system
• Measurement of energy relaxation in quantum Hall edge states utilizing quantum point contacts
• Point-like topological defects in bilayer quantum Hall systems
• Evidence for the Luttigger liquid density of states in transport across the incompressible stripe at fractional filling factors
• Terahertz photoresponse of a quantum Hall edge-channel diode
• Local investigation of the energy gap within the incompressible strip in the quantum Hall regime
• Temperature dependent equilibration of spin orthogonal quantum Hall edge modes
• Charge redistribution between cyclotron-resolved edge states at high imbalance
• Manifestation of the bulk phase transition in the edge energy spectrum in a two dimensional bilayer electron system
• Edge reconstruction of compressible Quantum Hall fluid in the filling fraction range 1/3 to 2/3