Title: Magnetic-field dependence of the spin states of the negatively charged exciton in GaAs quantum wells
Authors: Vanhoucke, Tony ×
Hayne, Manus
Henini, M
Moshchalkov, Victor #
Issue Date: 2002
Series Title: Physical review. B, Condensed matter and materials physics vol:65 issue:23
Conference: date:Katholieke Univ Leuven, Lab Vaste Stoffys & Magnetisme, B-3001 Louvain, Belgium; Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England
Abstract: We present high-field (<50 T) photoluminescence measurements of the binding energy of the singlet and triplet states of the negatively charged exciton in a 200-Angstrom quantum well. Comparing our data with those of other groups and with theoretical predictions we clearly show how the singlet, "bright" and "dark" triplet states may be identified according to the high-field dependence of their binding energies. We demonstrate that a very consistent behavior of the binding energy in a magnetic field has been observed in quantum wells of different widths by different groups and conclude that the triplet state found in this, as well as nearly all other experiments, is undoubtedly the bright triplet. By combining our data with that in the literature we are able to present the generic form of the binding energy of the spin states of the charged exciton in a magnetic field, which reveals the predicted singlet to dark triplet ground state transition at about 20 T.
ISSN: 1098-0121
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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