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 language||English (US)|
|Number of pages||4|
|Journal||Physical review letters|
|State||Published - Jan 1 1992|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)