We show the successful intercalation of large area (1 cm2) epitaxial few-layer graphene grown on 4H-SiC with FeCl3. Upon intercalation the resistivity of this system drops from an average value of ≈200Ω/sq to ≈16Ω/sq at room temperature. The magneto-conductance shows a weak localization feature with a temperature dependence typical of graphene Dirac fermions demonstrating the decoupling into parallel hole gases of each carbon layer composing the FeCl3 intercalated structure. The phase coherence length (≈1.2μm at 280 mK) decreases rapidly only for temperatures higher than the 2-D magnetic ordering in the intercalant layer while it tends to saturate for temperatures lower than the antiferromagnetic ordering between the planes of FeCl3 molecules providing the first evidence for magnetic ordering in the extreme two-dimensional limit of graphene.
@article{arxiv.1506.04959,
title = {Approaching magnetic ordering in graphene materials by FeCl$_3$ intercalation},
author = {T. H. Bointon and I. Khrapach and R. Yakimova and A. V. Shytov and M. F. Craciun and S. Russo},
journal= {arXiv preprint arXiv:1506.04959},
year = {2015}
}