arXiv:0710.3797 [cond-mat.mes-hall]AbstractReferencesReviewsResources
Two-dimensional magnetoexcitons in the presence of spin-orbit coupling
O. Olendski, Q. L. Williams, T. V. Shahbazyan
Published 2007-10-21, updated 2008-01-31Version 2
We study theoretically the effect of spin-orbit coupling on quantum well excitons in a strong magnetic field. We show that, in the presence of an in-plane field component, the excitonic absorption spectrum develops a double-peak structure due to hybridization of bright and dark magnetoexcitons. If the Rashba and Dresselhaus spin-orbit constants are comparable, the magnitude of splitting can be tuned in a wide interval by varying the azimuthal angle of the in-plane field. We also show that the interplay between spin-orbit and Coulomb interactions leads to an anisotropy of exciton energy dispersion in the momentum plane. The results suggest a way for direct optical measurements of spin-orbit parameters.