L. Zamora-Peredo

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Internationally, an electrical resistance standard is based on quantum Hall effect devices and, usually, these are based in AlGaAs/GaAs heterostructures. In this work we report the study of a set of quantum Hall effect devices by photoreflectance spectroscopy at 300 K. An optical signal associated to the electric field build in the 2DEG region was found and(More)
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