期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.076803
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资金
- NSF [DMR-0084173, DMR-0803730]
- State of Florida
- DOE [DE-FG-02-98ER45683]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0803730] Funding Source: National Science Foundation
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.
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