Magnetophotoluminescence of negatively charged excitons in narrow quantum wells

Vanhoucke, T. and Hayne, M. and Henini, M. and Moshchalkov, V. V. (2001) Magnetophotoluminescence of negatively charged excitons in narrow quantum wells. Physical review B, 63 (12): 125331. pp. 1253311-1253318. ISSN 1550-235X

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We present the results of photoluminescence experiments on the negatively charged exciton X- in GaAs/AlxGa1-xAs quantum wells (QW) in high magnetic fields (≤50 T). Three different QW widths are used here: 100, 120, and 150 Å. All optically allowed transitions of X- are observed, enabling us to experimentally verify its energy-level diagram. All samples behave consistently with this diagram. We have determined the binding energy Eb of the singlet and triplet state of X- between 23 and 50 T for the 120 and 150 Å QW, while only the triplet Eb is observed for the 100 Å QW. A detailed comparison with recent theoretical calculations shows an agreement for all samples across this entire field range.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Additional Information:
© 2001 American Physical Society
Uncontrolled Keywords:
?? electronic, optical and magnetic materialscondensed matter physicsqc physics ??
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Deposited On:
04 Apr 2008 08:16
Last Modified:
03 Apr 2024 23:31