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- DOI to cite this document:
- 10.5283/epub.11480
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Abstract
A scanning force microscope with a base temperature below 300 mK is used for measuring the local electron density of a two-dimensional electron gas embedded in a Ga[Al]As heterostructure. At different separations between atomic force microscope tip and sample, a dc voltage is applied between the tip and the electron gas while simultaneously recording the frequency shift of the oscillating tip. ...

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