Probing the potential landscape inside a two-dimensional electron-gas

Details Probing the potential landscape inside a two-dimensional electron-gas Probing the potential landscape inside a two-dimensional electron-gas

1999-04-21

arxiv.org/abs/cond-mat/9904301v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.84.2473

We report direct observations of the scattering potentials in a two-dimensional electron-gas using electron-beam diffaction-experiments. The diffracting objects are local density-fluctuations caused by the spatial and charge-state distribution of the donors in the GaAs-(Al,Ga)As heterostructures. The scatterers can be manipulated externally by sample illumination, or by cooling the sample down under depleted conditions.

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