Observation of AlGaAs/GaAs multiquantum well structure by scanning tunneling microscopy
- 1 January 1990
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 56 (1) , 36-38
- https://doi.org/10.1063/1.102639
Abstract
We have imaged an AlGaAs/GaAs multiquantum well structure by scanning tunneling microscopy (STM). In order to localize the structure the STM is integrated in a conventional scanning electron microscope. The observed surface structure has a periodicity of ≊180 Å and shows an apparent corrugation of ≊10 Å in the constant current mode. We discuss the possible mechanisms of the observed contrast, which we tentatively attribute to the different electrical properties of the two different layers.Keywords
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