Physics – Instrumentation and Detectors
Scientific paper
2009-11-15
Nanotechnology 21 (2010) 015707
Physics
Instrumentation and Detectors
Nanotechnology, to be published
Scientific paper
10.1088/0957-4484/21/1/015707
A nanoscale non-contact electrical measurement has been developed based on Auger electron spectroscopy. This approach used the speciality of Auger electron, which is self-generated and free from external influences, to overcome the technical limitations of conventional measurements. The detections of the intrinsic local charge and internal electric field for nanostructured materials were achieved with resolution below 10 nm. As an example, the electrical properties at the GaN/AlGaN/GaN nanointerfaces were characterized. The concentration of the intrinsic polarization sheet charges embedded in GaN/AlGaN nanointerfacial layers were accurately detected to be -4.4 e/nm^2. The mapping of internal electric field across the nanointerface revealed the actual energy band configuration at the early stage of the formation of two-dimensional electron gas.
Cai Duanjun
Chen Hangyang
Kang Junyong
Li Jinchai
Xu Fuchun
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