Mobile excitons and Fermi edge singularities in an interacting 2D electron gas

We present theoretical and experimental results on the evolution of the threshold absorption of a 2D electron gas as a function of electron density. We pay particular attention to the low density regime where the spectrum evolves from an exciton to a Fermi edge singularity. The many-body origin of t...

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Bibliographic Details
Published inSurface science Vol. 361; pp. 424 - 427
Main Authors Brum, J.A., Brown, S., Hawrylak, P., Young, J.F., Wasilewski, Z.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 20.07.1996
Subjects
Electron density, excitation spectra calculations
Gallium arsenide
Many-body and quasi-particle theories
Quantum effects
Quantum wells
Semiconductor-semiconductor heterostructures
Quantum effects
Gallium arsenide
Electron density, excitation spectra calculations
Quantum wells
Many-body and quasi-particle theories
Semiconductor-semiconductor heterostructures
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Summary:We present theoretical and experimental results on the evolution of the threshold absorption of a 2D electron gas as a function of electron density. We pay particular attention to the low density regime where the spectrum evolves from an exciton to a Fermi edge singularity. The many-body origin of the Moss-Burstein shift is emphasized.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(96)00436-0