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Invited Review Electronic properties of nanostructures defined in Ga[Al]As heterostructures by local oxidation

Fuhrer, A. ; Dorn, A. ; Lüscher, S. ; Heinzel, Thomas ; Ensslin, Klaus ; Wegscheider, Werner ; Bichler, Max
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Date of publication of this fulltext: 07 Dec 2009 13:18


Abstract

Semiconductor nanostructures are fabricated by local oxidation of Ga[Al]As heterostructures with an atomic force microscope (AFM). The GaAs surface is locally oxidized by applying a bias between the substrate and a conductive AFM tip in a humidity-controlled environment. For high-quality two-dimensional electron gases (2DEGS) located close enough to the sample surface the electrons get depleted ...

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