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VOLUME 44 (1986) | ISSUE 4 | PAGE 189
"Skin effect" and observation of nonuniform states of a 2D electron gas in a metal-insulator-semiconductor structure
A method is proposed for studying the spatial distribution of the conductivity σχχ of a layer of a 2D electron gas in a field-effect transistor. Under conditions of the quantum Hall effect, spatially nonuniform distributions of σχχ are found. It is shown that the presence of a transport current / under nonlinear conditions gives rise to a conductivity distribution which can be controlled by an electric field and which accounts for the formation of a filament of a Hall current.