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  Single-impurity tunneling spectroscopy to probe the discrete states of a two-dimensional electron gas in a quantizing magnetic field

Jouault, B., Gryglas, M., Faini, G., Gennser, U., Cavanna, A., Baj, M., et al. (2006). Single-impurity tunneling spectroscopy to probe the discrete states of a two-dimensional electron gas in a quantizing magnetic field. Physical Review B, 73(15): 155415.

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 Creators:
Jouault, B., Author
Gryglas, M., Author
Faini, G., Author
Gennser, U., Author
Cavanna, A., Author
Baj, M., Author
Maude, D. K.1, Author           
Affiliations:
1High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society, ou_3371774              

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 Abstract: A single impurity is used to probe the local density of states of a two-dimensional electron gas (2DEG) in a resonant tunneling experiment. The studies have been performed in the GaAs/AlAs/GaAs system, with Si donors incorporated into the AlAs layer, on submicrometer junctions. The current-voltage characteristics clearly show peaks corresponding to the formation of Landau levels. Moreover, additional fine-structure superimposed on the Landau levels are resolved. Detailed magnetic field studies suggest that those peaks reflect the single particle states of the Landau levels. The surprisingly rapid shift of these additional features in a magnetic field is reproduced in a model, which takes into account disorder in the plane of the 2DEG.

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Language(s): eng - English
 Dates: 2006
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 362119
ISI: 000237155100102
 Degree: -

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Title: Physical Review B
Source Genre: Journal
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Pages: - Volume / Issue: 73 (15) Sequence Number: 155415 Start / End Page: - Identifier: ISSN: 1098-0121