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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., & Döhler, G. H. (2006). Diamagnetic shift of disorder-localized excitons in narrow GaAs ∕ AlGaAs quantum wells. Physical Review B, 74: 125412. doi:10.1103/PhysRevB.74.125412.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000B-6316-D Version Permalink: https://hdl.handle.net/21.11116/0000-000D-0908-1
Genre: Journal Article

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PhysRevB.74.125412.pdf (Publisher version), 718KB
 
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Erdmann, M., Author
Ropers, Claus1, Author                 
Wenderoth, M., Author
Ulbrich, R. G., Author
Malzer, S., Author
Döhler, G. H., Author
Affiliations:
1Department of Ultrafast Dynamics, MPI for Biophysical Chemistry, Max Planck Society, Göttingen, DE, ou_3371855              

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 Abstract: A correlation between the diamagnetic shift and transition energy of disorder-localized excitons is observed in magnetomicrophotoluminescence (μPL) 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. μPL 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: 2006-09-13
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevB.74.125412
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 74 Sequence Number: 125412 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008