Abstract
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 with a step of , whereas the inversion-symmetric ABC trilayer exhibits plateaus at and 10 with fourfold spin and valley degeneracy.
- Received 25 June 2011
DOI:https://doi.org/10.1103/PhysRevB.84.161408
©2011 American Physical Society