The Aharonov-Bohm Effect in the Fractional Quantum Hall Regime

TL;DR

This paper experimentally investigates Aharonov-Bohm oscillations in the fractional quantum Hall regime, providing evidence consistent with fractional charge quasiparticles and exploring their behavior around antidots.

Contribution

It presents the first detailed experimental study of Aharonov-Bohm effects in the fractional quantum Hall regime, highlighting the role of fractional charge quasiparticles.

Findings

Aharonov-Bohm oscillations observed at 1/3 filling factor

Oscillation period matches that of integer quantum Hall regime

Results consistent with fractional charge e* quasiparticles

Abstract

We have investigated experimentally resonant tunnelling through single-particle states formed around an antidot by a magnetic field, in the fractional quantum Hall regime. For 1/3 filling factor around the antidot, Aharonov-Bohm oscillations are observed with the same magnetic field period as in the integer quantum Hall regime. All our measurements are consistent with quasiparticles of fractional charge e*. However, the results are also consistent with particles of any charge (>= e*) as the system must rearrange every time the flux enclosed increases by h/e.