Journal
SOLID STATE COMMUNICATIONS
Volume 144, Issue 9, Pages 395-398Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2007.07.044
Keywords
quantum wells; optical properties; exciton-exciton interaction
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The exciton-exciton interaction is investigated for spatially indirect excitons in coupled quantum wells. The Hartree-Fock and Heitler-London approaches are improved by a full two-exciton calculation including the van der Waals effect. Using these potentials for the singlet and triplet channel, the two-body scattering matrix is calculated and employed to derive a modified relation between exciton density and blue shift. Such a relation is of central importance for gauging exciton densities on the way toward Bose condensation. (C) 2007 Elsevier Ltd. All rights reserved.
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