We have measured the spin splitting in single-layer and bilayer graphene by means of tilted magnetic field experiments. Applying the Lifshitz-Kosevich formula for the spin-induced decrease of the Shubnikov de Haas amplitudes with increasing tilt angle we directly determine the product between the carrier cyclotron mass m* and the effective g-factor g* as a function of the charge carrier concentration. Using the cyclotron mass for a single-layer and a bilayer graphene we find an enhanced g-factor g* = 2.7 \pm 0.2 for both systems.
@article{arxiv.1107.3925,
title = {Spin splitting in graphene studied by means of tilted magnetic-field experiments},
author = {E. V. Kurganova and H. J. van Elferen and A. McCollam and L. A. Ponomarenko and K. S. Novoselov and A. Veligura and B. J. van Wees and J. C. Maan and U. Zeitler},
journal= {arXiv preprint arXiv:1107.3925},
year = {2011}
}