Spin-orbit effects on the Larmor dispersion relation in GaAs quantum wells

Abstract

We have studied the relevance of spin-orbit coupling to the dispersion 00009 relation of the Larmor resonance observed in inelastic light scattering and electron-spin resonance experiments on GaAs quantum wells. We show that the spin-orbit interaction, here described by a sum of Dresselhaus and Bychkov-Rashba terms, couples Zeeman and spin-density excitations. We have evaluated its contribution to the spin splitting as a function of the magnetic field $B$, and have found that in the small $B$ limit, the spin-orbit interaction does not contribute to the spin splitting, whereas at high magnetic fields it yields a $B$ independent contribution to the spin splitting given by $2({\lambda }_R^2-{\lambda }_D^2)$, with ${\lambda }_{R,D}$ being the intensity of the Bychkov-Rashba and Dresselhaus spin-orbit terms.

To be published in Physical Review B

References in corpus (1)

• Spin-orbit coupling and anisotropy of spin splitting in quantum dots

Cited by in corpus (2)

• Spin-orbit effects in GaAs quantum wells: Interplay between Rashba, Dresselhaus, and Zeeman interactions
• Spin-orbit excitations of quantum wells