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Transport in weakly and strongly modulated two-dimensional electron systems realized by Cleaved-Edge-Overgrowth

Feil, Thomas ; Deutschmann, R. A. ; Wegscheider, Werner ; Rother, Martin ; Schuh, Dieter ; Bichler, Max ; Abstreiter, Gerhard ; Rieder, Bernhard ; Keller, Joachim
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Date of publication of this fulltext: 11 Jan 2010 13:24


Abstract

Periodic modulation of a free two-dimensional electron system changes the bandstructure in which the electrons move. A weak modulation opens up small energy gaps in the free electron bandstructure while a strong, short-period modulation leads to the formation of well separated cosine-like minibands. We study transport in both cases using structures grown with the Cleaved-Edge-Overgrowth method. ...

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