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Author Palacios, J. J. ♦ Yoshioka, D. ♦ MacDonald, A. H.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ EXCITONS ♦ BOUND STATE ♦ ELECTRON-HOLE COUPLING ♦ MAGNETIC FIELDS ♦ CHARGE STATES ♦ BINDING ENERGY ♦ GROUND STATES ♦ PHOTOLUMINESCENCE ♦ VARIATIONAL METHODS ♦ TWO-DIMENSIONAL CALCULATIONS ♦ LANDAU LEVELS
Abstract We consider the charged exciton complexes of an ideal two-dimensional electron-hole system in the limit of strong magnetic fields. A series of charged multiple-exciton states is identified and variational and finite-size exact-diagonalization calculations are used to estimate their binding energies. We find that, because of a hidden symmetry, bound states of excitons and an additional electron cannot be created by direct optical absorption and, once created, have an infinite optical recombination lifetime. We also estimate the optical recombination rates when electron and hole layers are displaced and the hidden symmetry is violated. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-07-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 4


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