In situ control of electron gas dimensionality in freely suspended semiconductor membranes

DOI to cite this document:: 10.5283/epub.11344

Höhberger, Eva M. ; Krämer, Tomas ; Wegscheider, Werner ; Blick, Robert H.

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Date of publication of this fulltext: 14 Dec 2009 13:11

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Abstract

We present fabrication and measurements of gated suspended low-dimensional electron systems. The core component of the device is a low-dimensional electron gas embedded in a free-standing beam processed from a GaAs/AlGaAs heterostructure. The dimensionality of the electronic system is fully controlled by a number of gating electrodes on the suspended membranes. Operation in the quantum Hall ...