Observation of a reentrant insulating phase near the 1/3 fractional quantum Hall liquid in a two-dimensional hole system

M. B. Santos, Y. W. Suen, M. Shayegan, Y. P. Li, L. W. Engel, D. C. Tsui

Research output: Contribution to journalArticle

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Abstract

In a dilute, low-disorder, two-dimensional IholeR system at the GaAs/AlGaAs heterointerface, we observe a reentrant insulating behavior around the =1/3 fractional quantum Hall liquid at B5 T, strikingly similar to recent observations in low-disorder 2D IelectronR systems near =1/5. We interpret this behavior as manifesting a weakly pinned hole Wigner crystal around =1/3, and suggest that its observation at such large is a result of Landau level mixing which, in the case of much heavier holes, significantly modifies the ground-state energies of the fractional quantum Hall and Wigner crystal states of the system.

Original languageEnglish (US)
Pages (from-to)1188-1191
Number of pages4
JournalPhysical review letters
Volume68
Issue number8
DOIs
StatePublished - Jan 1 1992

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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