Interference effects in transport across a single incompressible strip at the edge of the fractional quantum Hall system

Abstract

We experimentally investigate interference effects in transport across a single incompressible strip at the edge of the quantum Hall system by using a Fabry-Perot type interferometer. We find the interference oscillations in transport across the incompressible strips with local filling factors ${\nu }_c=1,4/3,2/3$ even at high imbalances, exceeding the spectral gaps. In contrast, there is no sign of the interference in transport across the principal Laughlin ${\nu }_c=1/3$ incompressible strip. This indicates, that even at fractional ${\nu }_c$, the interference effects are caused by "normal" electrons. The oscillation's period is determined by the effective interferometer area, which is sensitive to the filling factors because of screening effects.

Final version. To appear in PRB

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Cited by in corpus (4)

• Spatially-resolved analysis of edge-channel equilibration in quantum Hall circuits
• A quantum Hall Mach-Zehnder interferometer far beyond the equilibrium
• Anyonic Mach-Zehnder interferometer on a single edge of a 2D electron gas
• Anyonic analogue of optical Mach-Zehnder interferometer