| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1547546 | Physica E: Low-dimensional Systems and Nanostructures | 2006 | 4 Pages |
Abstract
Spectroscopy of local cyclotron emission from the hot spots is carried out on a GaAs/AlGaAs heterostructure two-dimensional electron gas system at B=6 T (ν=2.5) by applying a terahertz scanning microscope. The spectra of CE at the current entry and exit corners (hot spots) are remarkably broadened towards lower frequencies with increasing I up to 300 μA, indicating substantial relevance of non-equilibrium electrons generated in higher-level LLs; in terms of effective electron temperature, TE reaching as high as 300 K is suggested while TE=25–30 K on an average in the surrounding region (within a distance of 50 μm) about the hot point.
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Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
H. Sakuma, K. Ikushima, S. Komiyama, K. Hirakawa,