High-frequency magneto-oscillations in GaAs/AlGaAs quantum wells

被引：5
|
作者：
Tan, Y. -W. [1 ]
Stormer, H. L.
Pfeiffer, L. N.
West, K. W.
机构：
[1] Columbia Univ, Dept Phys, New York, NY 10027 USA
[2] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA
[3] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 03期
关键词：
D O I：
10.1103/PhysRevLett.98.036804
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have observed very high-frequency, highly reproducible magneto-oscillations in modulation doped GaAs/AlGaAs quantum well structures. The oscillations are periodic in an inverse magnetic field (1/B) and their amplitude increases with temperature up to T similar to 700 mK. Being initially most pronounced around the filling factor nu=1/2, they move towards lower nu with increasing T. Front and back-gating data imply that these oscillations require a coupling to a parallel conducting layer. A comparison with existing oscillation models renders no explanation.
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页数：4
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