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  Diamagnetic shift of disorder-localized excitons in narrow GaAs/AlGaAs quantum wells

Erdmann, M., Ropers, C., Wenderoth, M., Ulbrich, R. G., Malzer, S., & Doehler, G. H. (2006). Diamagnetic shift of disorder-localized excitons in narrow GaAs/AlGaAs quantum wells. PHYSICAL REVIEW B, 74(12): 125412. doi:10.1103/PhysRevB.74.125412.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-6D86-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-6D87-2
Genre: Journal Article

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 Creators:
Erdmann, M.1, Author
Ropers, C.1, Author
Wenderoth, M.1, Author
Ulbrich, R. G.1, Author
Malzer, S.2, Author              
Doehler, G. H.2, Author              
Affiliations:
1external, ou_persistent22              
2Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364712              

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Free keywords: SEMICONDUCTOR NANOSTRUCTURES; FINE-STRUCTURE; LANDAU-LEVELS; DOTS; THERMALIZATION; ENERGY; SYSTEM; WIRES; HOLE; MASSPhysics;
 Abstract: A correlation between the diamagnetic shift and transition energy of disorder-localized excitons is observed in magnetomicrophotoluminescence (mu PL) on narrow GaAs/Al0.3Ga0.7As quantum wells (QW's). The QW's were grown by molecular-beam epitaxy without growth interruption at the interfaces. mu PL spectra were obtained in a confocal setup with the magnetic field applied normal to the QW plane. The lowest-energy exciton states have the smallest diamagnetic coefficients; the exciton diamagnetic shift in the localized exciton tail of the QW emission spectra increases by a factor of 2 as a function of transition energy. The positive correlation between diamagnetic shift and emission energy reveals exciton localization by short-range correlated interface disorder.

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Language(s): eng - English
 Dates: 2006
 Publication Status: Published online
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

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Title: PHYSICAL REVIEW B
Source Genre: Journal
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Publ. Info: ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA : AMERICAN PHYSICAL SOC
Pages: - Volume / Issue: 74 (12) Sequence Number: 125412 Start / End Page: - Identifier: ISSN: 1098-0121