Two-dimensional magnetoexcitons in the presence of spin-orbit coupling
Autor: | Olendski, O., Williams, Q. L., Shahbazyan, T. V. |
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Rok vydání: | 2007 |
Předmět: | |
Zdroj: | Phys.Rev.B77:125338,2008 |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevB.77.125338 |
Popis: | 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. Comment: 9 pages, 6 figures |
Databáze: | arXiv |
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