Two-dimensional charged magneto-excitons: magnetic translations and localization

For composite complexes – quasi-two-dimensional (2D) charged magneto-excitons X − – we propose a new exact classification of states, which is based on magnetic translations. We consider implications of this symmetry for magneto-optical transitions. It is shown, in particular, that in a translational...

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Bibliographic Details
Published in:Physica. E, Low-dimensional systems & nanostructures Low-dimensional systems & nanostructures, 2000-02, Vol.6 (1), p.226-229
Main Authors: Dzyubenko, A.B., Sivachenko, A.Yu
Format: Article
Language:English
Subjects:
Charged magneto-exitons
Magnetic localization
Magnetic translations
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Summary:For composite complexes – quasi-two-dimensional (2D) charged magneto-excitons X − – we propose a new exact classification of states, which is based on magnetic translations. We consider implications of this symmetry for magneto-optical transitions. It is shown, in particular, that in a translationally invariant system with a simple valence band, the ground triplet X t − state is dark in interband transitions at finite magnetic fields B. This exact result calls for the re-interpretation of several previous theoretical studies. We consider the symmetry-breaking effects of spatial lateral confinement on internal transitions of charged complexes.
ISSN:1386-9477
1873-1759
DOI:10.1016/S1386-9477(99)00119-8