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Updated: Jun 14, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
Published on: November 1, 2013
Evidence for developing fractional quantum Hall states at even denominator 1/2 and 1/4 fillings in asymmetric wide
J Shabani1, T Gokmen, Y T Chiu
1Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
Abstract:
We report the observation of developing fractional quantum Hall states at Landau level filling factors nu = 1/2 and 1/4 in electron systems confined to wide GaAs quantum wells with significantly asymmetric charge distributions. The very large electric subband separation and the highly asymmetric charge distribution at which we observe these quantum Hall states, together with the fact that they disappear when the charge distribution is made symmetric, suggest that these are one-component states, possibly described by the Moore-Read Pfaffian wave function.
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