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Enhanced excitonic interactions in doped quantum wells in high magnetic fields

Abstract:

We report a strong enhancement and transformation of the Fermi edge singularity at high magnetic fields in a series of doped GaAs-Al33%Ga67%As quantum wells with width varying from 68 Angstrom to 150 Angstrom with carrier densities similar to4 (.) 10(11)cm(-2). We explain this behavior in terms of a resonance process due to collective excitations of the 2D system created by interband absorption. Such a collective excitation or "Mahan" trion occurs whenever a pair of electrons with a total mom...

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Publication status:
Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Role:
Author
Volume:
87
Pages:
989-990
Publication date:
2001-01-01
ISSN:
0930-8989
URN:
uuid:673f78cc-8a00-47e0-a17a-517a39684a81
Source identifiers:
24054
Local pid:
pubs:24054
ISBN:
3-540-41778-8

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