OBSERVATION OF A REENTRANT INSULATING PHASE NEAR THE 1/3 FRACTIONAL QUANTUM HALL LIQUID IN A 2-DIMENSIONAL HOLE SYSTEM

被引：159
作者：
SANTOS, MB
SUEN, YW
SHAYEGAN, M
LI, YP
ENGEL, LW
TSUI, DC
机构：
[1] Department of Electrical Engineering, Princeton University, Princeton
来源：
PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 08期
关键词：
D O I：
10.1103/PhysRevLett.68.1188
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In a dilute, low-disorder, two-dimensional hole system at the GaAs/AlGaAs heterointerface, we observe a reentrant insulating behavior around the nu = 1/3 fractional quantum Hall liquid at B congruent-to 5 T, strikingly similar to recent observations in low-disorder 2D electron systems near nu = 1/5. We interpret this behavior as manifesting a weakly pinned hole Wigner crystal around nu = 1/3, and suggest that its observation at such large-nu is a result of Landau-level mixing which, in the case of much heavier boles, significantly modifies the ground-state energies of the fractional quantum Hall and Wigner crystal states of the system.
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页码：1188 / 1191
页数：4
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