Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1999-09-06
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
7 pages, 3 eps figures. Submitted to Phys. Rev. Lett, minor typos corrected
Scientific paper
10.1103/PhysRevB.61.R13361
We observe sharp peaks and strong hysteresis in the electronic transport of a two-dimensional electron gas (2DEG) in the region of the integral quantum Hall effect. The peaks decay on time scales ranging from several minutes to more than an hour. Momentary grounding of some of the contacts can vastly modify the strength of the peaks. All these features disappear under application of a negative bias voltage to the backside of the specimen. We conclude, that a conduction channel parallel to the high mobility 2DEG is the origin for the peaks and their hysteretic behavior.
Baldwin Kirk W.
Pfeiffer Loren N.
Stormer Horst L.
West Ken. W.
Zhu Jia-Ji
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