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1995 | 87 | 2 | 473-476
Article title

Quantum Magnetotransport in InGaAs/InP at High Magnetic Fields and Low Temperatures

Content
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Languages of publication
EN
Abstracts
EN
Quantum Hall effect and Shubnikov-de Haas effect measurements were made in two-dimensional electron gas in liquid phase epitaxially grown Ga_{0.47}In_{0.53}As/InP heterostructures in high magnetic fields in the temperature range from 4.2 K down to 60 mK. Two-dimensional electron gas concentrations and mobilities were in the range of (1 - 3) × 10^{11} cm^{-2} and (1 - 3) × 10^{4} cm^{2}/(V s), respectively. Corresponding to this the i = 1 quan­tum Hall effect plateau occurred at about 6 T magnetic field. Although fractional occupation numbers of about 0.3 were reached, no signs of frac­tional quantization were detected. Both current and frequency breakdown of the quantum Hall effect were investigated. Narrowing of the plateaus with increasing current differs from that measured in GaAs/AlGaAs structures because of the different mechanisms of dissipation. The fact that the mag­netic length becomes smaller than the characteristic scale of the disorder seems to be essential in understanding the low frequency breakdown via the presence of quasi-classical electron states.
Keywords
EN
Publisher

Year
Volume
87
Issue
2
Pages
473-476
Physical description
Dates
published
1995-02
Contributors
author
  • CNRS Centre de Recherches sur les Tres Basses Temperatures, Grenoble France
  • Department of Low Temperature Physics, Eotvos Lorand University, Budapest, Hungary
author
  • A.F. Ioffe Physico-Technical Institute of the Russian Academy of Sciences, St. Petersburg, Russia
author
  • Research Institute for Technical Physics of the Hungarian Academy of Sciences, Budapest, Hungary
author
  • Research Institute for Technical Physics of the Hungarian Academy of Sciences, Budapest, Hungary
author
  • Research Institute for Technical Physics of the Hungarian Academy of Sciences, Budapest, Hungary
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv87z242kz
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