Time-resolved optical measurements of electron spin dynamics in modulation doped InGaAs quantum wells are used to explore electron spin coherence times and spin precession frequencies in a regime where an out of plane magnetic field quantizes the states of a two-dimensional electron gas into Landau levels. Oscillatory features in the transverse spin coherence time and effective g-factor as a function of applied magnetic field exhibit a correspondence with Shubnikov-de Haas oscillations, illustrating a coupling between spin and orbital eigenstates. We present a theoretical model in which inhomogeneous dephasing due to the population of different Landau levels limits the spin coherence time and captures the essential experimental results.
@article{arxiv.cond-mat/0407681,
title = {Control of Electron Spin Coherence Using Landau Level Quantization in a Two-Dimensional Electron Gas},
author = {V. Sih and W. H. Lau and R. C. Myers and A. C. Gossard and M. E. Flatté and D. D. Awschalom},
journal= {arXiv preprint arXiv:cond-mat/0407681},
year = {2007}
}