Two-dimensional magnetoexcitons in the presence of spin-orbit coupling

Abstract

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.

9 pages, 6 figures

References in corpus (5)

• Spin relaxation and decoherence of holes in quantum dots
• Theory of phonon-induced spin relaxation in laterally coupled quantum dots
• Observation of Spin Relaxation Anisotropy in Semiconductor Quantum Wells
• Anisotropy of spin splitting and spin relaxation in lateral quantum dots
• Anisotropic spin relaxation in quantum dots

Cited by in corpus (4)

• Prediction of large linear-in-k spin splitting for holes in the 2D GaAs/AlAs system
• Alternative method for the quantitative determination of Rashba- and Dresselhaus spin-orbit interaction using the magnetization
• Experimental determination of Rashba and Dresselhaus parameters and $g^{\ast }$-factor anisotropy via Shubnikov-de Haas oscillations
• Spectral and localization properties of the Dirichlet wave guide with two concentric Neumann discs