Exciton Transport in a Bilayer Quantum Hall Superfluid

TL;DR

This paper reports on experiments demonstrating exciton transport in a bilayer quantum Hall system at q=1, using Corbino geometry to directly observe neutral exciton flow across the incompressible quantum Hall state.

Contribution

The study provides direct experimental evidence of exciton transport in a bilayer quantum Hall superfluid using Corbino devices, highlighting a neutral transport mode.

Findings

Direct detection of exciton transport across the bulk

Use of Corbino geometry suppresses charge transport

Confirmation of excitonic superfluid behavior

Abstract

Bilayer quantum Hall systems at \nu =1 support an excitonic ground state. In addition to the usual charged quasiparticles, this system possesses a condensate degree of freedom: exciton transport. Detection of this neutral transport mode is facilitated by the use of the Corbino multiply-connected geometry in which charge transport is suppressed. We here summarize our recent experiments on Corbino devices which directly demonstrate exciton transport across the bulk of the incompressible \nu =1 quantum Hall state.