Observation of reentrant quantum Hall states in the lowest Landau level

Abstract

Measurements in very low disorder two-dimensional electrons confined to relatively wide GaAs quantum well samples with tunable density reveal reentrant $\nu =1$ integer quantum Hall states in the lowest Landau level near filling factors $\nu =4/5$ and 6/5. These states are not seen at low densities and become more prominent with increasing density and in wider wells. Our data suggest a close competition between different types of Wigner crystal states near these fillings. We also observe an intriguing disappearance and reemergence of the $\nu =4/5$ fractional quantum Hall effect with increasing density.

References in corpus (3)

• Microwave Resonance of 2D Wigner Crystal around integer Landau fillings
• Evidence for Two Different Solid Phases of Two Dimensional Electrons in High Magnetic Fields
• When are the $q/3$ fractional quantum Hall states stable?

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• Inequivalence of the low-density insulating state and quantum Hall insulating states in a strongly correlated two-dimensional electron system
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