We report markedly different transport properties of ABA- and ABC-stacked trilayer graphenes. Our experiments in double-gated trilayer devices provide evidence that a perpendicular electric field opens an energy gap in the ABC trilayer, while it causes the increase of a band overlap in the ABA trilayer. In a perpendicular magnetic field, the ABA trilayer develops quantum Hall plateaus at filling factors of \nu = 2, 4, 6... with a step of \Delta \nu = 2, whereas the inversion symmetric ABC trilayer exhibits plateaus at \nu = 6 and 10 with 4-fold spin and valley degeneracy.
@article{arxiv.1106.4995,
title = {Stacking-order dependent transport properties of trilayer graphene},
author = {S. H. Jhang and M. F. Craciun and S. Schmidmeier and S. Tokumitsu and S. Russo and M. Yamamoto and Y. Skourski and J. Wosnitza and S. Tarucha and J. Eroms and C. Strunk},
journal= {arXiv preprint arXiv:1106.4995},
year = {2011}
}