Microwave-aided transport measurements on high-density two-dimensional electron systems confined at AlGaN/GaN heterointerfaces
Journal
Physica Status Solidi C: Conferences
Journal Issue
7
Pages
2323-2326
Date Issued
2003
Author(s)
Abstract
We present microwave-aided magnetotransport measurements on high-density two-dimensional electron gas (2DEG) systems confined at AlGaN/GaN heterointerfaces. We show that the modulated patterns of Shubnikov-de Haas (SdH) oscillations which are due to higher-subband occupation can be drastically enhanced by employing the microwave modulation technique, allowing direct experimental observation and analysis. In addition, the SdH oscillations can be observed at a much lower magnetic field. Thus we provide a powerful way to study high-density 2DEG systems which possesses higher resolution and enhanced pattern, does not alter carrier concentrations, and merely requires direct data analysis without numerical artifacts compared with conventional measurements. (© 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Type
conference paper