Observation of Reentrant Phases Induced by Short-Range Disorder in the Lowest Landau Level of AlxGa1-xAs/Al0.32Ga0.68As Heterostructures

被引：17

作者：

Li, Wanli ^{[1
]}

Luhman, D. R. ^{[2
]}

Tsui, D. C. ^{[2
]}

Pfeiffer, L. N. ^{[2
]}

West, K. W. ^{[2
]}

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 07期

基金：

美国国家科学基金会;

关键词：

2-DIMENSIONAL ELECTRON-SYSTEM; QUANTUM HALL LIQUID; INSULATING PHASE; WIGNER-CRYSTAL; DENSITY; TRANSITION; SERIES; STATES;

D O I：

10.1103/PhysRevLett.105.076803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of a reentrant quantum Hall effect in the lowest Landau level between filling factors of 2/3 and 3/5 in a AlxGa1-xAs/Al0.32Ga0.68As heterostructure sample with x 0.85%. A reentrant insulating phase is also observed between filling factors of 2/5 and 1/3, demonstrating particle-hole symmetry between these phases. A sample with x = 0.21% shows much weaker reentrant features, indicating that increased short-range scattering, due to the Al alloy in the conduction channel, aids in the formation of these phases.

引用

页数：4

共 24 条

[1] Evidence for two different solid phases of two-dimensional electrons in high magnetic fields [J].