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Scanning Tunneling Spectroscopy

Interacting electron systems in different dimensions

We use the simple, isotropic and largely parabolic conduction band of InAs to study the influence of electron-disorder and electron-electron interactions on the appearance of the local density of states. Dimensionality and magnetic field are systematically varied, while electron density and the disorder potential are independently determined which gives full access to the input parameters of the Schrödinger equation. Since, on the other hand, the local density of states is directly linked to the output of the Schrödinger equation, we get access to the fascinating quantum world of interacting electrons (see results).

Future projects are directed towards the study of nanostructures as nanotubes and nanocrystals and towards experiments on ferromagnet/semiconductor interfaces.

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